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smôl 36mm 16-way Flexible Printed Circuit

Availability: Back Order
Item #: CAB-18731 -
Price: $1.81 inc GST
Sparkfun

This is the 36mm 16-way 0.5mm-pitch Flexible Printed Circuit used to interconnect smôl boards. smôl is an ecosystem of miniature processor boards, peripheral boards, power boards and accessories....

This is the 36mm 16-way 0.5mm-pitch Flexible Printed Circuit used to interconnect smôl boards. smôl is an ecosystem of miniature processor boards, peripheral boards, power boards and accessories. Designed to be both physically small and to have the smallest possible current draw, smôl is the perfect choice for applications like wildlife tracking or discrete long-term monitoring. smôl boards are designed to stack one on top of the other, using 16-way 0.5mm-pitch Flexible Printed Circuits (FPCs)...

smôl ARTIC R2

Availability: Out of Stock
Item #: SPX-18618 -
Price: $343.90 inc GST
Sparkfun

Our RedBoards are great. But don't they sometimes seem a little BIG?! Enter smôl, a new range of boards which are both small in size and small on current draw. It's a smôl world! Is your project...

Our RedBoards are great. But don't they sometimes seem a little BIG?! Enter smôl, a new range of boards which are both small in size and small on current draw. It's a smôl world! Is your project linked to environmental protection, awareness or study, or to protecting human life? Perhaps you are developing a wildlife tracker, ocean buoy, environmental monitoring system or need to transfer emergency medical information? Do you need to be able to transmit and receive data anywhere? If so, this is...

smôl ESP32

Availability: Back Order
Item #: SPX-18619 -
Price: $31.29 inc GST
Sparkfun

Our RedBoards are great. But don't they sometimes seem a little BIG?! Enter smôl, a new range of boards which are both small in size and small on current draw. It's a smôl world! The smôl ESP32...

Our RedBoards are great. But don't they sometimes seem a little BIG?! Enter smôl, a new range of boards which are both small in size and small on current draw. It's a smôl world! The smôl ESP32 Processor Board combines Espressif's ESP32 (ESP32-D0WDQ6-V3) with our smôl FPC interconnect to bring a processor board with reliable wireless capabilities into our smôl ecosystem. The ESP32 includes a laundry list of functionality, including the dual-core Tensilica LX6 microprocessor, 240MHz clock...

smôl Header

Availability: Back Order
Item #: SPX-18620 -
Price: $5.16 inc GST
Sparkfun

Our RedBoards are great. But don't they sometimes seem a little BIG?! Enter smôl, a new range of boards which are both small in size and small on current draw. It's a smôl world! smôl boards are...

Our RedBoards are great. But don't they sometimes seem a little BIG?! Enter smôl, a new range of boards which are both small in size and small on current draw. It's a smôl world! smôl boards are designed to stack one on top of the other, using 16-way 0.5mm-pitch Flexible Printed Circuits (FPCs). We really like FPCs and we're using them on more and more of our products. But they can be a bit tricky when it comes to prototyping or if you want to connect other devices to your smôl stack. The smôl...

smôl Power Board AAA

Availability: Back Order
Item #: SPX-18621 -
Price: $30.86 inc GST
Sparkfun

Our RedBoards are great. But don't they sometimes seem a little BIG?! Enter smôl, a new range of boards which are both small in size and small on current draw. It's a smôl world! The smôl Power...

Our RedBoards are great. But don't they sometimes seem a little BIG?! Enter smôl, a new range of boards which are both small in size and small on current draw. It's a smôl world! The smôl Power Board AAA is an intelligent power board for the smôl ecosystem. Designed to boost the voltage from one or two AAA or AA cells up to 3.3V, you would expect this board to have a TPS61200 regulator on it, and indeed it does. (That's the same regulator we use on our LiPower - Boost Converter.) But you...

smôl Power Board LiPo

Availability: Back Order
Item #: SPX-18622 -
Price: $30.86 inc GST
Sparkfun

Our RedBoards are great. But don't they sometimes seem a little BIG?! Enter smôl, a new range of boards which are both small in size and small on current draw. It's a smôl world! The smôl Power...

Our RedBoards are great. But don't they sometimes seem a little BIG?! Enter smôl, a new range of boards which are both small in size and small on current draw. It's a smôl world! The smôl Power Board LiPo is an intelligent power board for the smôl ecosystem. You would expect this board to have an MCP73831 Li-Ion and Li-Polymer charger on it, and indeed it does. You would also expect this board to have a MAX17048 I2C fuel gauge on it, and indeed it does. But you probably wouldn't expect it to...

smôl ZOE-M8Q

Availability: Back Order
Item #: SPX-18623 -
Price: $68.69 inc GST
Sparkfun

Our RedBoards are great. But don't they sometimes seem a little BIG?! Enter smôl, a new range of boards which are both small in size and small on current draw. It's a smôl world! The smôl ZOE-M8Q is...

Our RedBoards are great. But don't they sometimes seem a little BIG?! Enter smôl, a new range of boards which are both small in size and small on current draw. It's a smôl world! The smôl ZOE-M8Q is a high accuracy, miniaturized, GNSS board that is perfect for applications that don't possess a lot of space. The on-board ZOE-M8Q is a 72-channel GNSS receiver, meaning it can receive signals from the GPS, GLONASS, BeiDou and Galileo constellations. This increases precision and decreases lock...

Smooth Belt - 1/8"D (12" ID)

Availability: Out of Stock
Item #: ROB-12446 -
Price: $9.88 inc GST
Sparkfun

These smooth (round) belts have a Durometer hardness of A70 and can withstand temperatures from -35 to 250 degrees F. Their elastic nature allows them to apply tension on the pulleys when stretched...

These smooth (round) belts have a Durometer hardness of A70 and can withstand temperatures from -35 to 250 degrees F. Their elastic nature allows them to apply tension on the pulleys when stretched and the rubber construction creates excellent grip characteristics between the pulley and belt. Smooth belts can be used in a variety of applications including follow focus systems, linear drives, 90 degree drives, XY tables, robot tracks, battery hold-downs, etc. Actobotics is a robotics building...

Smooth Belt - 1/8"D (7.0" ID)

Availability: Out of Stock
Item #: ROB-12336 -
Price: $4.93 inc GST
Sparkfun

These smooth (round) belts have a Durometer hardness of A70 and can withstand temperatures from -35 to 250 degrees F. Their elastic nature allows them to apply tension on the pulleys when stretched...

These smooth (round) belts have a Durometer hardness of A70 and can withstand temperatures from -35 to 250 degrees F. Their elastic nature allows them to apply tension on the pulleys when stretched and the rubber construction creates excellent grip characteristics between the pulley and belt. Smooth belts can be used in a variety of applications including follow focus systems, linear drives, 90 degree drives, XY tables, robot tracks, battery hold-downs, etc. Actobotics is a robotics building...

Snap Assortment - 30 pack (male and female)

Availability: Stocked
Item #: DEV-11347 -
Price: $6.26 inc GST
Sparkfun

These sew-on fabric snaps are the same size used on the LilyPad SimpleSnap boards. You can sew these into your project to allow for easy removal or prototyping. They are 8mm snaps, which is...

These sew-on fabric snaps are the same size used on the LilyPad SimpleSnap boards. You can sew these into your project to allow for easy removal or prototyping. They are 8mm snaps, which is equivalent to a size #1/0 at your local fabric shop. Includes: 15x male snaps 15x female snaps

Snap Circuits - 300 Experiments

Availability: Back Order
Item #: KIT-14316 -
Price: $122.94 inc GST
Sparkfun

The Snap Circuits kit makes learning electronics easy and fun while providing plenty of ideas for the future! With this kit you will be able to build 305 different experiments with 61 individual...

The Snap Circuits kit makes learning electronics easy and fun while providing plenty of ideas for the future! With this kit you will be able to build 305 different experiments with 61 individual parts to learn the basics of electronics or expand on what you already know. Simply follow the in-depth user manuals included in the kit to be able to build exciting projects such as AM radios, burglar alarms, doorbells and much more! Assembling each experiment is achieved by mounting parts to a...

Snap Circuits Jr. - 100 Experiments

Availability: Out of Stock
Item #: KIT-14315 -
Price: $67.06 inc GST
Sparkfun

The Snap Circuits Jr. kit makes learning electronics easy and fun! With this Snap Circuits kit you will be able to build 101 different experiments with 32 individual parts to teach the budding...

The Snap Circuits Jr. kit makes learning electronics easy and fun! With this Snap Circuits kit you will be able to build 101 different experiments with 32 individual parts to teach the budding engineer the basics of electronics. Simply follow the in-depth user manual included in the kit to be able to build exciting projects such as a flying saucer, alarms, doorbells and much more! Assembling each experiment is achieved by mounting parts to a plastic peg board or to each other, forming simple...

Sno Shoe - Arduino Compatible HDMI

Availability: Back Order
Item #: SPX-17120 -
Price: $22.24 inc GST
Sparkfun

We love the Alorium Technology Snō Development Board! Alorium have done a really great job in integrating an ATmega328-compatible core into the FPGA, which you can then program from the Arduino IDE...

We love the Alorium Technology Snō Development Board! Alorium have done a really great job in integrating an ATmega328-compatible core into the FPGA, which you can then program from the Arduino IDE and access the features of a Verilog Xcelerator Block (XB) from normal Arduino code. You can even include your favourite SparkFun libraries and use them as if you were running the code on a RedBoard! One of our engineers loves the Snō so much, he took one on holiday with him and remixed Sameer...

Soft Power Switch

Availability: Out of Stock
Item #: SPX-17870 -
Price: $7.74 inc GST
Sparkfun

The Soft Power Switch is a passive, hard on/off switch with software feedback and control. In other words, it's like the on/off switch on a laptop. A simple press will turn the system on. Another...

The Soft Power Switch is a passive, hard on/off switch with software feedback and control. In other words, it's like the on/off switch on a laptop. A simple press will turn the system on. Another press can (with MCU intervention) turn off the system. And if things go really wrong, pressing and holding the button will force a power-down. If you're building something with an enclosed battery and need a good power button, this is the board you need. The Sense/Control pin can act as an output to a...

SoftPot Membrane Potentiometer - 200mm

Availability: Back Order
Item #: SEN-08679 -
Price: $24.03 inc GST
Sparkfun

These are very thin variable potentiometers. By pressing down on various parts of the strip, the resistance linearly changes from 100Ohms to 10,000Ohms allowing the user to very accurately calculate...

These are very thin variable potentiometers. By pressing down on various parts of the strip, the resistance linearly changes from 100Ohms to 10,000Ohms allowing the user to very accurately calculate the relative position on the strip. Can be used as an accurate positional indicator for CNC head positioning, variable user input (volume level input for example), straight user input (multiple button areas translate to given resistance levels), and many other applications. Unit comes with adhesive...

SoftPot Membrane Potentiometer - 500mm

Availability: Back Order
Item #: SEN-08681 -
Price: $48.06 inc GST
Sparkfun

These are very thin variable potentiometers. By pressing down on various parts of the strip, the resistance linearly changes from 100Ohms to 10,000Ohms allowing the user to very accurately calculate...

These are very thin variable potentiometers. By pressing down on various parts of the strip, the resistance linearly changes from 100Ohms to 10,000Ohms allowing the user to very accurately calculate the relative position on the strip. Can be used as an accurate positional indicator for CNC head positioning, variable user input (volume level input for example), straight user input (multiple button areas translate to given resistance levels), and many other applications. Unit comes with adhesive...

SoftPot Membrane Potentiometer - 50mm

Availability: Stocked
Item #: SEN-08680 -
Price: $11.43 inc GST
Sparkfun

These are very thin variable potentiometers. By pressing down on various parts of the strip, the resistance linearly changes from 100Ohms to 10,000Ohms allowing the user to very accurately calculate...

These are very thin variable potentiometers. By pressing down on various parts of the strip, the resistance linearly changes from 100Ohms to 10,000Ohms allowing the user to very accurately calculate the relative position on the strip. Can be used as an accurate positional indicator for CNC head positioning, variable user input (volume level input for example), straight user input (multiple button areas translate to given resistance levels), and many other applications. Unit comes with adhesive...

Solar Panel (9v 220mA)

Availability: Back Order
Item #: FIT0330 -
Price: $13.62 inc GST
DFRobot

Need a clean energy source for your project? Check out this compact,high quality,high output endurable solar panel.The peak power output is around 9V at 220mA.Can also be used in series to work as...

Need a clean energy source for your project? Check out this compact,high quality,high output endurable solar panel.The peak power output is around 9V at 220mA.Can also be used in series to work as recharger for 12V batteries. Ultra-white glass lamination process provides an efficient and waterproof surface for the panel.The back of the panel has separate aluminium wires. Note:The above refers to the electrical performance parameters measured under standard test conditions, namely: light...

Solar Panel - 2W

Availability: Back Order
Item #: PRT-13781 -
Price: $53.65 inc GST
Sparkfun

Have a project that needs some good power? Do you like free power provided by our friend, Mr. Sun? Check out this high quality, high output, fully enclosed solar panel with a nice solid...

Have a project that needs some good power? Do you like free power provided by our friend, Mr. Sun? Check out this high quality, high output, fully enclosed solar panel with a nice solid aluminum/plastic frame. The panel is capable of 2 watts in the open sun with a peak power output around 6V at 378mA. The termination is equipped with a 3.5mm x 1.1mm barrel plug and 5.5mm x 2.1mm adapter on a 22cm (8in) cable making the panel able to mate directly with many of our development boards. Each panel...

Solar Panel - 3.5W

Availability: Back Order
Item #: PRT-13782 -
Price: $72.65 inc GST
Sparkfun

Have a project that needs some good power? Do you like free power provided by our friend, Mr. Sun? Check out this high quality, high output, fully enclosed solar panel with a nice solid...

Have a project that needs some good power? Do you like free power provided by our friend, Mr. Sun? Check out this high quality, high output, fully enclosed solar panel with a nice solid aluminum/plastic frame. The panel is capable of 3.5 watts in the open sun with a peak power output around 6V at 615mA. The termination is equipped with a 3.5mm x 1.1mm barrel plug and 5.5mm x 2.1mm adapter on a 22cm (8in) cable making the panel able to mate directly with many of our development boards. Each...

Solar Panel - 6W

Availability: Back Order
Item #: PRT-13783 -
Price: $109.53 inc GST
Sparkfun

Have a project that needs some good power? Do you like free power provided by our friend, Mr. Sun? Check out this high quality, high output, fully enclosed solar panel with a nice solid...

Have a project that needs some good power? Do you like free power provided by our friend, Mr. Sun? Check out this high quality, high output, fully enclosed solar panel with a nice solid aluminum/plastic frame. The panel is capable of 6 watts in the open sun with a peak power output around 6V at 1025mA. The termination is equipped with a 3.5mm x 1.1mm barrel plug and 5.5mm x 2.1mm adapter on a 22cm (8in) cable making the panel able to mate directly with many of our development boards. Each...

Solar Panel - 9W

Availability: Back Order
Item #: PRT-13784 -
Price: $144.18 inc GST
Sparkfun

Have a project that needs some good power? Do you like free power provided by our friend, Mr. Sun? Check out this high quality, high output, fully enclosed solar panel with a nice solid...

Have a project that needs some good power? Do you like free power provided by our friend, Mr. Sun? Check out this high quality, high output, fully enclosed solar panel with a nice solid aluminum/plastic frame. The panel is capable of 9 watts in the open sun with a peak power output around 6V at 1500mA. The termination is equipped with a 3.5mm x 1.1mm barrel plug and 5.5mm x 2.1mm adapter on a 22cm (8in) cable making the panel able to mate directly with many of our development boards. Each...

Solar Panel Charger - 10W

Availability: Back Order
Item #: PRT-16835 -
Price: $32.58 inc GST
Sparkfun

Have a project that needs some good power? Do you like free power provided by our friend, Mr. Sun? This solar panel charger is a lightweight, ultra thin (2mm), and affordable power solution. This...

Have a project that needs some good power? Do you like free power provided by our friend, Mr. Sun? This solar panel charger is a lightweight, ultra thin (2mm), and affordable power solution. This panel comes with a 5V USB connection port. The panel is capable of 10 watts in the open sun with a peak power output around 6V at 1700mA. This panel features a monocrystalline silicon material to provide a 20% high photoelectric conversion rate. With a frosted surface makes the panel scratch resistant...

Solder - 1/4lb Spool (0.020") Special Blend

Availability: Back Order
Item #: TOL-10242 -
Price: $55.88 inc GST
Sparkfun

We don't want to hype this solder TOO much, but this could possibly be the best solder in the world. There, we've said it. This is a special blend made specifically for us and we love it. It all...

We don't want to hype this solder TOO much, but this could possibly be the best solder in the world. There, we've said it. This is a special blend made specifically for us and we love it. It all started as a quest to find the best solder to use in our production process and ended up being the best we've tried. The best part is that it's lead free and has a water-soluble flux core. This package contains 1/4lb of solder and has a diameter of 0.020" (0.5mm). **Mix: **96.35% Sn (Tin), 3.0% Ag...

Solder - 1/4lb Spool (0.032") Special Blend

Availability: Back Order
Item #: TOL-10243 -
Price: $44.71 inc GST
Sparkfun

We don't want to hype this solder TOO much, but this could possibly be the best solder in the world. There, we've said it. This is a special blend made specifically for us and we love it. It all...

We don't want to hype this solder TOO much, but this could possibly be the best solder in the world. There, we've said it. This is a special blend made specifically for us and we love it. It all started as a quest to find the best solder to use in our production process and ended up being the best we've tried. The best part is that it's lead free and has a water-soluble flux core. This package contains 1/4lb of solder and has a diameter of 0.032" (0.8mm). **Mix: **96.35% Sn (Tin), 3.0% Ag...

Solder Lead Free - 100-gram Spool

Availability: Stocked
Item #: TOL-09325 -
Price: $14.33 inc GST
Sparkfun

This is your basic spool of lead free solder with a water soluble resin core. 0.031" gauge and 100 grams. This is a good spool for more advanced users that should last 6-12 months depending on how...

This is your basic spool of lead free solder with a water soluble resin core. 0.031" gauge and 100 grams. This is a good spool for more advanced users that should last 6-12 months depending on how often you solder. If you are just beginning to solder, we recommend you order the leaded solder. Lead-free solder is a bit harder to use (does not flow as well). Mix: 99.3% Sn / 0.7% Cu Documents: MSDS ...

Solder Lead Free - 15-gram Tube

Availability: Stocked-NoBackOrder
Item #: TOL-09163 -
Price: $6.33 inc GST
Sparkfun

This is your basic tube of unleaded (Pb-free) solder with a no clean, water soluble resin core. 0.031" gauge and 15 grams. Mix: 96.5% tin / 3.0% silver / 0.5% copper

This is your basic tube of unleaded (Pb-free) solder with a no clean, water soluble resin core. 0.031" gauge and 15 grams. Mix: 96.5% tin / 3.0% silver / 0.5% copper

Solder Leaded - 100-gram Spool

Availability: Stocked
Item #: TOL-09161 -
Price: $11.96 inc GST
Sparkfun

This is your basic spool of leaded solder with a 63/37 water soluble resin core. 0.031" gauge and 100 grams. This is a good spool for more advanced users that should last 6-12 months depending on...

This is your basic spool of leaded solder with a 63/37 water soluble resin core. 0.031" gauge and 100 grams. This is a good spool for more advanced users that should last 6-12 months depending on how often you solder. Mix: 63% Sn / 37% Pb

Solder Leaded - 15-gram Tube

Availability: Back Order
Item #: TOL-09162 -
Price: $3.35 inc GST
Sparkfun

This is your basic tube of leaded solder with a 63/37 water soluble resin core. 0.031" gauge and 15 grams (around 5ft). Easy to solder with - recommended for beginners. Mix: 63% Sn / 37% Pb ...

This is your basic tube of leaded solder with a 63/37 water soluble resin core. 0.031" gauge and 15 grams (around 5ft). Easy to solder with - recommended for beginners. Mix: 63% Sn / 37% Pb

Solder Paste - 50g (Lead Free)

Availability: Back Order
Item #: TOL-12878 -
Price: $29.15 inc GST
Sparkfun

This is 50g of high quality, Lead-Free Solder Paste, the perfect amount to keep around for prototyping and hobby projects that require a bit of SMD soldering. Solder Paste Stenciling is the easiest...

This is 50g of high quality, Lead-Free Solder Paste, the perfect amount to keep around for prototyping and hobby projects that require a bit of SMD soldering. Solder Paste Stenciling is the easiest and quickest way to solder some of the trickier SMD components. Here at SparkFun, we use solder paste stenciling on pretty much all of our boards. It saves us a lot of time. But stenciling takes more than just a stencil and a dream... you're going to need some paste. The composition of this paste is...

Solder Tip Polishing Bar

Availability: Back Order
Item #: TOL-14233 -
Price: $24.81 inc GST
Sparkfun

Do you need to remove the oxidation and surface contamination from your soldering iron tip? The Solder Tip Polishing Bar allows you to do just that! This bar provides a great way to bring your older...

Do you need to remove the oxidation and surface contamination from your soldering iron tip? The Solder Tip Polishing Bar allows you to do just that! This bar provides a great way to bring your older or neglected soldering tips back from the dead. Just make sure the tip is cold, give it a good scrubbing with this bar, and you're all set! It is important to immediately tin the just-polished tip to avoid oxidation. Note: Only use this polishing bar when the soldering tip is cool. Do NOT use the...

Solder Tip Tinner and Cleaner

Availability: Back Order
Item #: TOL-13246 -
Price: $18.22 inc GST
Sparkfun

Tip tinner is a good thing to have in your arsenal of soldering supplies. Composed of a mild acid, it helps remove baked on residue (for when you melt your desk top) and helps prevent oxidation (the...

Tip tinner is a good thing to have in your arsenal of soldering supplies. Composed of a mild acid, it helps remove baked on residue (for when you melt your desk top) and helps prevent oxidation (the nasty black stuff) that accumulates on your soldering tip when not in use. Comes in a sealed 20 gram disk. This tinner is Lead Free. Documents: [MSDS](https://cdn.sparkfun.com/datasheets/Tools/Part 9763 10439 - SDS - Chip Quik.pdf) Product Video ...

Solder Vacuum

Availability: Stocked
Item #: TOL-13203 -
Price: $8.94 inc GST
Sparkfun

The Solder Vacuum, a great (and sometimes under appreciated) little tool for solder rework. It allows you to pull the molten solder out of a connection or via with ease. To use it you simply depress...

The Solder Vacuum, a great (and sometimes under appreciated) little tool for solder rework. It allows you to pull the molten solder out of a connection or via with ease. To use it you simply depress the plunger, heat up your solder, place the nozzle over the solder you want to remove and finally just push the button. The piston pops up and the solder disappears! This solder vacuum has a black metal body with a hard plastic nozzle and buttons.

Solder Wick #2 25ft. - TechSpray

Availability: Back Order
Item #: TOL-08775 -
Price: $55.88 inc GST
Sparkfun

Solder wick, coffee, and paper towels keep SparkFun running. You can steal someone's diagonal cutters for a minute, but you'd better ask before touching their solder wick. Solder wick is a composed...

Solder wick, coffee, and paper towels keep SparkFun running. You can steal someone's diagonal cutters for a minute, but you'd better ask before touching their solder wick. Solder wick is a composed of copper threads braided together. Flux is normally added to help the solder flow from where it is not supposed to be (the jumper) to the wick. Hence, solder wick is sometimes called desolder braid. Yes, you really can solder anything, and solder wick is a large part of the process. TechSpray makes...

Solder Wick #2 5ft. - Generic

Availability: Stocked
Item #: TOL-09327 -
Price: $4.52 inc GST
Sparkfun

Solder wick, coffee, and paper towels keep SparkFun running. You can steal someone's diagonal cutters for a minute, but you'd better ask before touching their solder wick. Solder wick is composed of...

Solder wick, coffee, and paper towels keep SparkFun running. You can steal someone's diagonal cutters for a minute, but you'd better ask before touching their solder wick. Solder wick is composed of copper threads braided together. Flux is normally added to help the solder flow from where it is not supposed to be (the jumper) to the wick. Hence, solder wick is sometimes called desolder braid. Yes, you really can solder anything, and solder wick is a large part of the process. This wick is...

Solder-Mate Solder Dispenser

Availability: Back Order
Item #: TOL-14232 -
Price: $20.55 inc GST
Sparkfun

The Solder-Mate™ Solder Dispenser provides you with an easy way to, well...dispense solder! This handy tool provides a continuous supply of solder (until the roll runs out, that is), freeing up hand...

The Solder-Mate™ Solder Dispenser provides you with an easy way to, well...dispense solder! This handy tool provides a continuous supply of solder (until the roll runs out, that is), freeing up hand space and minimizing downtime. Each solder dispenser can hold up to a 1lb solder spool. This is a great addition to any workbench! Note: Solder is NOT included with the Solder-Mate and will need to be purchased separately.