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Artech Smart Digital Multimeter - A875

Availability: Back Order
Item #: TOL-18340 -
Price: $29.39 inc GST
Sparkfun

The digital multimeter (DMM) is an essential tool in every electronic enthusiasts arsenal. This Smart Digital Multimeter, however, is not your average multimeter, it features a continuity sound at...

The digital multimeter (DMM) is an essential tool in every electronic enthusiasts arsenal. This Smart Digital Multimeter, however, is not your average multimeter, it features a continuity sound at less than about 40±5Ω, current/voltage sense, and a Smart Measurement feature. You can use the multimeter to measure AC/DC voltage, AC/DC current, resistance, continuity, capacitance, frequency, temperature, NCV, and test diodes. With Smart Measurement this multimeter will automatically identify the...

ATmega128RFA1 Development Board

Availability: Stocked-NoBackOrder
Item #: DEV-11197 -
Price: $52.50 inc GST
Sparkfun

"The ATmega128RFA1 is a portmanteau of sorts – two separate components combined to form one device; half microcontroller, half RF transciever. ATmega128RFA1 is an IEEE 802.15.4 compliant...

"The ATmega128RFA1 is a portmanteau of sorts – two separate components combined to form one device; half microcontroller, half RF transciever. ATmega128RFA1 is an IEEE 802.15.4 compliant single-chip, combining the industry- leading AVR microcontroller and best-in-class 2.4GHz RF transceiver providing industry’s highest RF performance for single-chip devices, with a link budget of 103.5dBm. The ATmega128RFA1 features Wake-on Radio, 32-bit MAC symbol counter, temperature sensor,...

ATmega328 - TQFP

Availability: Back Order
Item #: COM-13448 -
Price: $7.31 inc GST
Sparkfun

This is Atmel's high performance, low power 8-bit AVR ATMega328 microcontroller in a pint-sized TQFP package. Yes, you really can solder that. Note: There is no difference between this part and its...

This is Atmel's high performance, low power 8-bit AVR ATMega328 microcontroller in a pint-sized TQFP package. Yes, you really can solder that. Note: There is no difference between this part and its previous version. This new copy was created to help make our in house assemblies easier to produce and manage. Features: 1.8-5.5V operating range Up to 20MHz Part: ATMEGA328P-AU 32kB Flash program memory 1kB EEPROM 2kB Internal SRAM 2 8-bit Timer/Counters 1 16-bit Timer/Counter RTC with separate...

ATmega328 with Arduino Optiboot (Uno)

Availability: Stocked
Item #: DEV-10524 -
Price: $9.94 inc GST
Sparkfun

The name says it all on this one. An ATmega328P in DIP package, pre-loaded with the Arduino Optiboot (Uno 16MHz) Bootloader. This will allow you to use Arduino code in your custom embedded project...

The name says it all on this one. An ATmega328P in DIP package, pre-loaded with the Arduino Optiboot (Uno 16MHz) Bootloader. This will allow you to use Arduino code in your custom embedded project without having to use an actual Arduino board. To get this chip working with Arduino IDE, you will need an external 16MHz crystal or resonator, a 5V supply, and a serial connection. If you are not comfortable doing this, we recommend purchasing the Arduino Uno board that has all of these built into...

Atomic Clock

Availability: Out of Stock
Item #: SPX-14830 -
Price: $4,116.48 inc GST
Sparkfun

The Miniature Atomic Clock (MAC) from Microsemi uses a rubidium laser to output an extremely accurate clock. We're speaking at the edge of our knowledge so please bear with us but the short-term...

The Miniature Atomic Clock (MAC) from Microsemi uses a rubidium laser to output an extremely accurate clock. We're speaking at the edge of our knowledge so please bear with us but the short-term stability (Allan Deviation) is ≤8*10-12. From Wikipedia on Atomic Clocks: For context, a femtosecond (1×10−15 s) is to a second what a second is to about 31.71 million (31.71×106) years and an attosecond (1×10−18 s) is to a second what a second is to about 31.71 billion (31.71×109) years. That puts the...

Attachment Blocks - 12 pack

Availability: Out of Stock
Item #: ROB-12531 -
Price: $17.86 inc GST
Sparkfun

These aluminum attachment blocks make it possible to connect two flat panels at a 90° angle. These blocks come in packs of 12 and each offers two 6-32 tapped holes 0.32" deep for your mounting...

These aluminum attachment blocks make it possible to connect two flat panels at a 90° angle. These blocks come in packs of 12 and each offers two 6-32 tapped holes 0.32" deep for your mounting applications. Documents: SketchUp Part Product Page (585400) ...

Atto84 with Arduino Bootloader

Availability: Out of Stock
Item #: SPX-14804 -
Price: $13.30 inc GST
Sparkfun

Arduino and Arduino compatible dev boards are an awesome tool for developing an idea quickly but, being development boards, they're often a little more bulky and full featured than you really need....

Arduino and Arduino compatible dev boards are an awesome tool for developing an idea quickly but, being development boards, they're often a little more bulky and full featured than you really need. Having a USB interface and a bootloader is so nice, though, so we put together the bare minimum Arduino compatible breakout for integration into your small projects. We call it the Atto84. The Atto84 is essentially a breakout board for the absolutely minute WQFN ATtiny84, but we've done some work to...

AttoPilot Voltage and Current Sense Breakout - 45A

Availability: Stocked
Item #: SEN-10643 -
Price: $38.16 inc GST
Sparkfun

"This is a small voltage and current sense PCB. DC current is determined by measuring a voltage drop across a pair of parallel shunt resistors, then converted to a final analog voltage output by the...

"This is a small voltage and current sense PCB. DC current is determined by measuring a voltage drop across a pair of parallel shunt resistors, then converted to a final analog voltage output by the TI INA-169. Voltage sense is accomplished by scaling to 3.3V ADC range by a precision resistor divider. The PCB is supplied without leads or connectors. The pad sizes are large enough to accommodate 12 gauge heavy duty leads (see datasheet) but care must be exercised in soldering. Smaller gauge...

ATX Power Supply Connector - Right Angle

Availability: Stocked
Item #: PRT-09498 -
Price: $3.52 inc GST
Sparkfun

This is a right-angle, 24-pin Molex Mini-Fit Jr.™ connector, commonly used as the power supply connector on ATX motherboards. Two rows of twelve pins are broken out two rows of through-hole male...

This is a right-angle, 24-pin Molex Mini-Fit Jr.™ connector, commonly used as the power supply connector on ATX motherboards. Two rows of twelve pins are broken out two rows of through-hole male headers. See the datasheet below for pin spacing dimensions. Pair this connector with a standard computer power supply and you can source a number of different voltages (+3.3V, +5V, +12V, -12V, -5V) to your project.[ Documents: Dimensional Drawing ...

ATX Right Angle Connector - PTH 4-pin

Availability: Back Order
Item #: PRT-15700 -
Price: $1.38 inc GST
Sparkfun

This 4-pin, ATX, right angle connector mates up to the standard 4-pin computer peripheral port often found on ATX power supplies. This connector will also serve as a replacement to that found in the...

This 4-pin, ATX, right angle connector mates up to the standard 4-pin computer peripheral port often found on ATX power supplies. This connector will also serve as a replacement to that found in the SparkFun ATX Power Connector Breakout Kit. Features: Works with 12V & 5V devices. Documents: Assembly & Hookup Guide Datasheet ...

Audio Cable 2.5mm 8"

Availability: Back Order
Item #: CAB-10159 -
Price: $3.51 inc GST
Sparkfun

This is a simple 8" long 2.5mm audio cable. It is terminated with a 2.5mm audio plug on one side and unterminated with bare wires on the other end. These are to be used with the ModKit shields. The...

This is a simple 8" long 2.5mm audio cable. It is terminated with a 2.5mm audio plug on one side and unterminated with bare wires on the other end. These are to be used with the ModKit shields. The 2.5mm plug is the same one used by many devices. A lot of older cell phones used this size for the headsets. It is the audio jack size generally used on a lot of portable electronics that didn't use the traditional 3.5mm headphone jack. Also, the Rebel line of Canon dSLRs use this jack for shutter...

Audio Cable to Alligator Clips - 2.5mm

Availability: Back Order
Item #: CAB-17983 -
Price: $1.81 inc GST
Sparkfun

This is an Audio to Alligator Cable, an 8in. long 22 AWG wire with two alligator clips at one end and a 2.5mm mono plug at the other. Documents: Datasheet ...

This is an Audio to Alligator Cable, an 8in. long 22 AWG wire with two alligator clips at one end and a 2.5mm mono plug at the other. Documents: Datasheet

Audio Cable TRRS - 18" (pigtail)

Availability: Back Order
Item #: CAB-11580 -
Price: $2.58 inc GST
Sparkfun

TRRS connectors are the 3.5mm audio-style connectors that you see on some phones, MP3 players and development boards. TRRS stands for "Tip, Ring, Ring, Sleeve," which reflects the fact that, unlike...

TRRS connectors are the 3.5mm audio-style connectors that you see on some phones, MP3 players and development boards. TRRS stands for "Tip, Ring, Ring, Sleeve," which reflects the fact that, unlike a standard stereo connector, this actually has three conductors and a ground. Some devices use the extra conductor for a microphone (like hands-free headsets) or to carry a video signal (like in some MP3/MP4 players) If you're hacking on something that has a 4-conductor audio jack, being able to...

Audio Cable TRRS - 1ft

Availability: Back Order
Item #: CAB-14163 -
Price: $2.58 inc GST
Sparkfun

This is a foot-long white audio cable that has been terminated with two TRRS connectors at each end. TRRS connectors are the 3.5mm audio-style connectors that you see on some phones, MP3 players and...

This is a foot-long white audio cable that has been terminated with two TRRS connectors at each end. TRRS connectors are the 3.5mm audio-style connectors that you see on some phones, MP3 players and development boards. TRRS stands for “Tip, Ring, Ring, Sleeve,” which reflects the fact that, unlike a standard stereo connector, this actually has three conductors and a ground. Some devices use the extra conductor for a microphone (as in hands-free headsets) or to carry a video signal (as in some...

Audio Jack - 1/4" Stereo (right angle)

Availability: Back Order
Item #: COM-11144 -
Price: $1.72 inc GST
Sparkfun

This is the kind of 1/4" stereo jack you might find in home stereos and PA systems. Switched contacts allow you to detect whether or not there is something plugged in to the jack. The jack can be...

This is the kind of 1/4" stereo jack you might find in home stereos and PA systems. Switched contacts allow you to detect whether or not there is something plugged in to the jack. The jack can be panel mounted in an 11mm diameter hole. The jack comes with a plastic washer and nut for panel mounting. Note: Looking for a breakout to hook this audio jack up to your project a little easier? Check out the SparkFun TRS Jack Breakout! Documents: Datasheet (JP-611) ...

Audio Jack - 3.5mm TRRS (SMD)

Availability: Back Order
Item #: PRT-12639 -
Price: $1.72 inc GST
Sparkfun

This is a 3.5mm TRRS SMD audio jack. TRRS connectors are the audio-style connectors that you see on some phones, MP3 players and development boards. TRRS stands for "tip, ring, ring, sleeve," which...

This is a 3.5mm TRRS SMD audio jack. TRRS connectors are the audio-style connectors that you see on some phones, MP3 players and development boards. TRRS stands for "tip, ring, ring, sleeve," which reflects the fact that, unlike a standard stereo connector, this actually has three conductors and a ground. Some devices use the extra conductor for a microphone (like hands-free headsets) or to carry a video signal (like in some MP3/MP4 players). Documents: Dimensional Drawing ...

Audio Jack 3.5mm

Availability: Stocked
Item #: PRT-08032 -
Price: $2.66 inc GST
Sparkfun

Low profile 3.5mm stereo audio jack. Documents: Audio 3.5mm Jack Datasheet ...

Low profile 3.5mm stereo audio jack. Documents: Audio 3.5mm Jack Datasheet

Audio Plug - 3.5mm

Availability: Back Order
Item #: COM-11143 -
Price: $0.86 inc GST
Sparkfun

This is a simple 3.5mm TRS stereo audio jack with a screw-on plastic shroud. These are great for projects that plug into headphone jacks. Stereo plugs can also be used for carrying serial comm...

This is a simple 3.5mm TRS stereo audio jack with a screw-on plastic shroud. These are great for projects that plug into headphone jacks. Stereo plugs can also be used for carrying serial comm connections! The outer shell unscrews to reveal solder terminals on the inside of the plug. Solder on your wires and crimp the strain relief to make a finished, professional-looking cable.

Auto-Digital Thermostat - ADT6401

Availability: Back Order
Item #: SPX-16772 -
Price: $15.54 inc GST
Sparkfun

Introducing the Auto-Digital Thermostat. The ADT6401 is a trip point temperature switch. Use the SPDT switches to set the temperature trip point and hysteresis settings. This breakout is a great...

Introducing the Auto-Digital Thermostat. The ADT6401 is a trip point temperature switch. Use the SPDT switches to set the temperature trip point and hysteresis settings. This breakout is a great addition for your temperature sensing projects. We do not plan to regularly produce SparkX products so get them while they’re hot! Experimental Product: SparkX products are rapidly produced to bring you the most cutting edge technology as it becomes available. These products are tested but come with no...

Automotive Jumper 2 Wire Assembly - 18 AWG

Availability: Out of Stock
Item #: PRT-09923 -
Price: $4.30 inc GST
Sparkfun

This is a simple two wire cable. It has bare wires on both ends with a Molex A and B connector in the middle. With thicker 18 AWG wire, it's better for higher current applications. Features: 6"...

This is a simple two wire cable. It has bare wires on both ends with a Molex A and B connector in the middle. With thicker 18 AWG wire, it's better for higher current applications. Features: 6" length Documents: Datasheet

Automotive Jumper 2 Wire Assembly - 26 AWG

Availability: Back Order
Item #: DD-14862 -
Price: $4.30 inc GST
Sparkfun

This is a simple two wire automotive cable. Each assembly has bare wires on both ends with a Molex A and B connector in the middle. With thinner 26 AWG wire, it’s better for applications that would...

This is a simple two wire automotive cable. Each assembly has bare wires on both ends with a Molex A and B connector in the middle. With thinner 26 AWG wire, it’s better for applications that would not require the thickness of its 18AWG counterpart. Note: Since this product belongs to our “Ding & Dent” category, once we are out of stock, we will not carry it again. Get them while you can! We also cannot accept requests/returns/exchanges, provide documentation or provide support on any aspect...

AVC 2017 Tee - Large

Availability: Back Order
Item #: SWG-14523 -
Price: $31.29 inc GST
Sparkfun

Were you not able to make it to the Autonomous Vehicle Competition (AVC) at Maker Faire® Denver this year? Or maybe you made it and just weren't able to get to our merch tent? Good news! For...

Were you not able to make it to the Autonomous Vehicle Competition (AVC) at Maker Faire® Denver this year? Or maybe you made it and just weren't able to get to our merch tent? Good news! For everyone who attended or wanted to attend our AVC and Battle Bots competitions, you can still get a shirt that says you were (or wanted to be) there! This large, lightweight red heather T-shirt proudly displays "Auto," the robotic warlord of the AVC track. On the back of this fitted tee is our SparkFun...

AVC 2017 Tee - Medium

Availability: Back Order
Item #: SWG-14522 -
Price: $31.29 inc GST
Sparkfun

Were you not able to make it to the Autonomous Vehicle Competition (AVC) at Maker Faire® Denver this year? Or maybe you made it and just weren't able to get to our merch tent? Good news! For...

Were you not able to make it to the Autonomous Vehicle Competition (AVC) at Maker Faire® Denver this year? Or maybe you made it and just weren't able to get to our merch tent? Good news! For everyone who attended or wanted to attend our AVC and Battle Bots competitions, you can still get a shirt that says you were (or wanted to be) there! This medium, lightweight red heather T-shirt proudly displays "Auto," the robotic warlord of the AVC track. On the back of this fitted tee is our SparkFun...

AVC 2017 Tee - Small

Availability: Back Order
Item #: SWG-14511 -
Price: $31.29 inc GST
Sparkfun

Were you not able to make it to the Autonomous Vehicle Competition (AVC) at Maker Faire® Denver this year? Or maybe you made it and just weren't able to get to our merch tent? Good news! For...

Were you not able to make it to the Autonomous Vehicle Competition (AVC) at Maker Faire® Denver this year? Or maybe you made it and just weren't able to get to our merch tent? Good news! For everyone who attended or wanted to attend our AVC and Battle Bots competitions, you can still get a shirt that says you were (or wanted to be) there! This small, lightweight red heather T-shirt proudly displays "Auto," the robotic warlord of the AVC track. On the back of this fitted tee is our SparkFun...

AVC 2017 Tee - XL

Availability: Out of Stock
Item #: SWG-14524 -
Price: $31.29 inc GST
Sparkfun

Were you not able to make it to the Autonomous Vehicle Competition (AVC) at Maker Faire® Denver this year? Or maybe you made it and just weren't able to get to our merch tent? Good news! For...

Were you not able to make it to the Autonomous Vehicle Competition (AVC) at Maker Faire® Denver this year? Or maybe you made it and just weren't able to get to our merch tent? Good news! For everyone who attended or wanted to attend our AVC and Battle Bots competitions, you can still get a shirt that says you were (or wanted to be) there! This XL, lightweight red heather T-shirt proudly displays "Auto," the robotic warlord of the AVC track. On the back of this fitted tee is our SparkFun emblem...

AVC 2017 Tee - XXL

Availability: Out of Stock
Item #: SWG-14519 -
Price: $31.29 inc GST
Sparkfun

Were you not able to make it to the Autonomous Vehicle Competition (AVC) at Maker Faire® Denver this year? Or maybe you made it and just weren't able to get to our merch tent? Good news! For...

Were you not able to make it to the Autonomous Vehicle Competition (AVC) at Maker Faire® Denver this year? Or maybe you made it and just weren't able to get to our merch tent? Good news! For everyone who attended or wanted to attend our AVC and Battle Bots competitions, you can still get a shirt that says you were (or wanted to be) there! This XXL, lightweight red heather T-shirt proudly displays "Auto," the robotic warlord of the AVC track. On the back of this fitted tee is our SparkFun...

AVC 2018 Tee - Large

Availability: Back Order
Item #: SWG-14981 -
Price: $31.29 inc GST
Sparkfun

Were you not able to make it to the 10th annual Autonomous Vehicle Competition (AVCX) this year? Or maybe you made it and just weren't able to find where we were selling all the sweet, sweet merch?...

Were you not able to make it to the 10th annual Autonomous Vehicle Competition (AVCX) this year? Or maybe you made it and just weren't able to find where we were selling all the sweet, sweet merch? Good news! For everyone who attended or wanted to attend our AVC and Battle Bots competitions, you can still get a shirt that says you were (or wanted to be) there! This large, lightweight black T-shirt proudly displays a large "X" (that's 10 in roman numerals) on a seven-segment display all in a...

AVC 2018 Tee - XL

Availability: Back Order
Item #: SWG-14982 -
Price: $31.29 inc GST
Sparkfun

Were you not able to make it to the the 10th annual Autonomous Vehicle Competition (AVCX) this year? Or maybe you made it and just weren't able to find where we were selling all the sweet, sweet...

Were you not able to make it to the the 10th annual Autonomous Vehicle Competition (AVCX) this year? Or maybe you made it and just weren't able to find where we were selling all the sweet, sweet merch? Good news! For everyone who attended or wanted to attend our AVC and Battle Bots competitions, you can still get a shirt that says you were (or wanted to be) there! This XL, lightweight black T-shirt proudly displays a large "X" (that's 10 in roman numerals) on a seven-segment display all in a...

AVR 14 Pin 20MHz 8K 12A/D - ATtiny84

Availability: Back Order
Item #: COM-11232 -
Price: $5.80 inc GST
Sparkfun

The ATtiny84 is another of Atmel's little tiny 8-Bit Processors. 8K of program space, 12 I/O lines, and 8-channel 10 bit ADC. It will run up to 20MHz with an external crystal and can be programmed...

The ATtiny84 is another of Atmel's little tiny 8-Bit Processors. 8K of program space, 12 I/O lines, and 8-channel 10 bit ADC. It will run up to 20MHz with an external crystal and can be programmed in circuit. Documents: Datasheet Product Card ATtiny Arduino Cores

AVR 28 Pin 20MHz 32K 6A/D - ATMega328P

Availability: Back Order
Item #: COM-09061 -
Price: $7.61 inc GST
Sparkfun

Atmel's ATmega328P 8-Bit Processor in 28 pin DIP package. It's like the ATmega168, with double the flash space. 32K of program space. 23 I/O lines, 6 of which are channels for the 10-bit ADC. Runs...

Atmel's ATmega328P 8-Bit Processor in 28 pin DIP package. It's like the ATmega168, with double the flash space. 32K of program space. 23 I/O lines, 6 of which are channels for the 10-bit ADC. Runs up to 20MHz with external crystal. Package can be programmed in circuit. 1.8V to 5V operating voltage! Documents: Datasheet Low Power Mode Tutorial ...

AVR 8 Pin 20MHz 8K 4A/D - ATtiny85

Availability: Back Order
Item #: COM-09378 -
Price: $5.80 inc GST
Sparkfun

Atmel's itty-bitty ATtiny85 8-Bit Processor. 8K of program space, 6 I/O lines, and 4-channel 10 bit ADC. Runs up to 20MHz with external crystal. Package can be programmed in circuit. Documents:...

Atmel's itty-bitty ATtiny85 8-Bit Processor. 8K of program space, 6 I/O lines, and 4-channel 10 bit ADC. Runs up to 20MHz with external crystal. Package can be programmed in circuit. Documents: Product Card Arduino Board Definitions

AVR ISP Shield - PTH Kit

Availability: Stocked
Item #: DEV-11168 -
Price: $34.69 inc GST
Sparkfun

AVR ISP Shield - PTH Kit Description: Did you know that your Arduino can spawn other Arduinos? Don't worry, it can't do it autonomously so you won't wind up with a replicator...

AVR ISP Shield - PTH Kit Description: Did you know that your Arduino can spawn other Arduinos? Don't worry, it can't do it autonomously so you won't wind up with a replicator situation (-gate, not -Trek). The point is, the ArduinoISP sketch allows your Arduino to act as a programmer. You can use this awesome power to burn bootloaders onto ATMega chips, turning them into Arduino-compatible microcontrollers! In the past, this required a breadboard and a whole mess...

AVR Programming Cable

Availability: Back Order
Item #: CAB-09215 -
Price: $3.35 inc GST
Sparkfun

This is a handy AVR programming cable that incorporates both the 10-pin and 6-pin ISP programming interfaces. Cable is about 12" long and mates with pins on 1/10in centers.

This is a handy AVR programming cable that incorporates both the 10-pin and 6-pin ISP programming interfaces. Cable is about 12" long and mates with pins on 1/10in centers.

AWS IoT ExpressLink SARA-R5 Starter Kit

Availability: Back Order
Item #: KIT-18450 -
Price: $397.63 inc GST
Sparkfun

Note - Please read before purchasing! The SARA-R5 module in the AWS IoT ExpressLink SARA-R5 Starter Kit only accepts AWS IoT ExpressLink AT commands. The regular u-blox SARA-R5 AT commands are not...

Note - Please read before purchasing! The SARA-R5 module in the AWS IoT ExpressLink SARA-R5 Starter Kit only accepts AWS IoT ExpressLink AT commands. The regular u-blox SARA-R5 AT commands are not supported. The AWS IoT ExpressLink SARA-R5 Starter Kit provides all you need to connect a device to AWS IoT Core over a cellular LTE-M network. The SARA-R5 module on the board supports the AWS IoT ExpressLink AT command set, which aims to make the app developer’s life easy. Built around AWS IoT...

Ball Bearing - Flanged (1/4" Bore, 1/2" OD, 2-Pack)

Availability: Stocked
Item #: ROB-13012 -
Price: $4.06 inc GST
Sparkfun

These flanged ball bearings fit nicely into a 1/2" diameter hole and has a 1/4" bore. This makes it perfect for all Actobotics channels, hub mounts, or any 1/2" hole where you need to run a 1/4"...

These flanged ball bearings fit nicely into a 1/2" diameter hole and has a 1/4" bore. This makes it perfect for all Actobotics channels, hub mounts, or any 1/2" hole where you need to run a 1/4" shaft. Each order is sold in packs of two. Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be intuitively connected together. The wide range...

Ball Caster Metal - 3/8"

Availability: Stocked-NoBackOrder
Item #: ROB-08909 -
Price: $5.65 inc GST
Sparkfun

This ball caster kit from Pololu includes a black ABS housing, a 3/8" diameter metal ball, two spacers (1/16" and 1/8" thick), and two #2 screw sets. The total height of this ball caster is 0.4"...

This ball caster kit from Pololu includes a black ABS housing, a 3/8" diameter metal ball, two spacers (1/16" and 1/8" thick), and two #2 screw sets. The total height of this ball caster is 0.4" with no spacers. You can also adjust the height by adding the spacers. The ball caster can be mounted to a chassis by the two screw sets included in the kit. The distance between the two screw holes is 0.53".