Products 289-336 of 3426
Show
Arduino Uno - R3 SMD
Price: $47.89
View
Availability: Back Order
Sparkfun Item #: DEV-11224 -

"This is the new Arduino Uno R3. In addition to all the features of the previous board, the Uno now uses an ATmega16U2 instead of the 8U2 found on the Uno (or the FTDI found on previous generations). This allows for faster transfer rates and more memory. No drivers needed for Linux or Mac (inf file for Windows is needed and included in the Arduino IDE), and the ability to have the Uno show up as a keyboard, mouse, joystick, etc. The Uno R3 also adds SDA and SCL pins next to the AREF. In...

Arduino Uno Enclosure - Black Plastic
OOD!
Price: $13.83
View
Availability: Back Order
Sparkfun Item #: PRT-12839 -

"The Arduino Uno is the undisputed champion of all development boards, why would you not want to keep your board safe and sound inside this black opaque plastic enclosure? These cases protect your Arduino Uno from things like rogue wires that might short it out while still allowing full access to the board! Simply snap the Uno into the bottom half of the enclosure, then snap the two sides together. As you may have noticed, these Arduino enclosures are actually an opaque black color. The...

Arduino Uno Enclosure - Clear Plastic
Price: $13.83
View
Availability: Back Order
Sparkfun Item #: PRT-12838 -

"The Arduino Uno is the undisputed champion of all development boards, why would you not want to keep your board safe and sound inside this clear plastic enclosure? These cases protect your Arduino Uno from things like rogue wires that might short it out while still allowing full access to the board! Simply snap the Uno into the bottom half of the enclosure, then snap the two sides together. As you may have noticed, these enclosures are actually transparent. The enclosures are perfect for...

Arduino Uno Rev 3
OOD!
Price: $41.20
View
Availability: Back Order
DFRobot Item #: DFR0181 -

This is the new Arduino Uno Rev 3. In addition to all the features of the previous board, the arduino Uno Rev 3 now uses an ATmega16U2 instead of the 8U2 found on the Uno (or the FTDI found on previous generations). This allows for faster transfer rates and more memory. No drivers needed for Linux or Mac (inf file for Windows is needed and included in the Arduino IDE), and the ability to have the Uno show up as a keyboard, mouse, joystick, etc. The arduino Uno R3 also adds SDA and SCL pins...

Arduino Workshop
Price: $54.69
View
Availability: Back Order
Sparkfun Item #: BOK-11932 -

"The Arduino is a cheap, flexible, open source microcontroller platform designed to make it easy for hobbyists to use electronics in homemade projects. With an almost unlimited range of input and output add-ons, sensors, indicators, displays, motors, and more, the Arduino offers you countless ways to create devices that interact with the world around you. Arduino Workshop, you’ll learn how these add-ons work and how to integrate them into your own projects. You’ll start off with an...

Arduino Yun
Price: $156.41
View
Availability: Stocked
Sparkfun Item #: DEV-12053 -

"Arduino is an open-source physical computing platform based on a simple i/o board and a development environment that implements the Processing/Wiring language. Arduino can be used to develop stand-alone interactive objects or can be connected to software on your computer (e.g. Flash, Processing, MaxMSP). The open-source IDE can be downloaded for free (currently for Mac OS X, Windows, and Linux). Arduino Yun is the first member of a new groundbreaking line of WiFi products combining the power...

Arduino Zero to Hero Kit
OOD!
Price: $194.24
View
Availability: Back Order
DFRobot Item #: KIT0133 -

Open-source, plug & play electronics toolkit for learning Arduino platform Online course created by Sanjin Dedi?Welcome to the world of electronics and programming!DFRobot proudly presents the Arduino Zero to Hero E-learning Kit which comes complete with an online course created by a well-known Australian Robotics Engineer and Teacher: Sanjin Dedi?. The online course is perfect for ambitious beginners and intermediate Arduino users trying to take their circuitry and programming to the next...

ATmega128RFA1 Development Board
Sale!
Price: $52.50
View
Availability: Stocked-NoBackOrder
Sparkfun Item #: DEV-11197 -

"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,...

ATMega2561
Price: $22.86
View
Availability: Back Order
Sparkfun Item #: COM-12906 -

"The ATMega2561 is one of Atmel’s low-power 8-bit AVR RISC-based microcontrollers. This SMD microcontroller features 256KB self-programming flash program memory, 8KB SRAM, 4KB EEPROM, 54 general purpose I/O pins, 8-channel 10-bit A/D-converter, and JTAG interface for on-chip-debug. This is the same controller that was used to be used on our Wiring Board. Documents: Datasheet " ...

ATmega328 - TQFP
OOD!
Price: $7.39
View
Availability: Back Order
Sparkfun Item #: COM-13448 -

"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...

ATmega328 Chip with Arduino Bootloader
OOD!
Price: $9.48
View
Availability: Back Order
DFRobot Item #: DFR0081 -

The name says it all on this one. An ATmega328 in DIP package, pre-loaded with the Arduino (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 Duemilanove board that has all of these built into the...

ATmega328 with Arduino Optiboot (Atmega328)
Price: $6.35
View
Availability: Stocked-NoBackOrder
Elecrow Item #: EL-AAM328AT -

    This is a ATmega328 IC in DIP package, pre-loaded with the Arduino Optiboot (Atmega328 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 works, you will need an external 16MHz crystal or resonator, and a 5V power supply to create the minimum Arduino system. If you are not comfortable doing this, we recommend you purchasing the Crowduino board...

ATmega328 with Arduino Optiboot (Uno)
Price: $9.56
View
Availability: Stocked
Sparkfun Item #: DEV-10524 -

"The name says it all on this one. An ATmega328 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...

ATMEGA328P-AU
Price: $5.84
View
Availability: Stocked-NoBackOrder
Elecrow Item #: EL-DTA00525C -

ATMEGA328P-AU is a high-performance, low-power consumption 8 bit microcontroller, and its core controller is AVR. It has 32KB of flash memory, and if the chip is power down, the data can still be retained.The architecture of the chip is advanced RISC, and can reset by power the chip. The number of digital-to-analog converters is eight and it has 23 input/output line. There are three types of chip interfaces: I2C,SPI and USART. The chip has an internally calibrated oscillator and has six sleep...

ATMega32U4 TQFP
Price: $12.09
View
Availability: Back Order
Sparkfun Item #: COM-11181 -

"The ATMega32U4 is Atmel’s low-power 8-bit AVR RISC-based microcontroller featuring 32KB self-programming flash program memory, 2.5KB SRAM, 1KB EEPROM, USB 2.0 full-speed/low speed device, 12-channel 10-bit A/D-converter, and JTAG interface for on-chip-debug. This is the same controller that’s used on the Pro Micro and Fio v3. Documents: Datasheet Product Video " ...

ATMEGA8U2-AU
Price: $4.18
View
Availability: Back Order
Sparkfun Item #: COM-13703 -

"The ATMEGA8U2-AU is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATMEGA8U2 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. The AVR core combines a rich instruction set with 32 general purpose working registers. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two...

Attachment Blocks - 12 pack
Price: $17.37
View
Availability: Back Order
Sparkfun Item #: ROB-12531 -

"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/585400.skp) Product Page (585400) " ...

AttoPilot Voltage and Current Sense Breakout - 180A
Price: $38.16
View
Availability: Back Order
Sparkfun Item #: SEN-10644 -

"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...

AttoPilot Voltage and Current Sense Breakout - 45A
Price: $38.16
View
Availability: Stocked
Sparkfun Item #: SEN-10643 -

"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...

AttoPilot Voltage and Current Sense Breakout - 90A
Price: $38.16
View
Availability: Back Order
Sparkfun Item #: SEN-09028 -

"This is a small voltage and current sense PCB. DC current is determined by measuring a voltage drop across a pair of parallel 1 mOhm 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...

ATX Power Supply Connector - Right Angle
Price: $3.39
View
Availability: Stocked
Sparkfun Item #: PRT-09498 -

"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.[ Breakout board](http://www.sparkfun.com/commerce/product_info.php?products_id=95...

ATX Power Supply Connector - Straight
OOD!
Price: $2.61
View
Availability: Back Order
Sparkfun Item #: PRT-09497 -

"This is a 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 datasheet for the pin spacings and other 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 " ...

Audio Cable 2.5mm 8"
Price: $3.39
View
Availability: Back Order
Sparkfun Item #: CAB-10159 -

"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...

Audio Cable TRRS - 1ft
OOD!
Price: $2.61
View
Availability: Back Order
Sparkfun Item #: CAB-14163 -

"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...

Audio Cable TRRS - 3ft
OOD!
Price: $4.35
View
Availability: Back Order
Sparkfun Item #: CAB-14164 -

"This is a 3-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...

Audio Jack - 1/4" Stereo (right angle)
OOD!
Price: $1.65
View
Availability: Back Order
Sparkfun Item #: COM-11144 -

"This is the kind of ¼" 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 (Panel Mount)
OOD!
Price: $0.87
View
Availability: Back Order
Sparkfun Item #: COM-11154 -

"This is a standard 3.5mm stereo jack with no frills. Panel mount in a 6mm diameter hole for a nice clean headphone, microphone or serial data connection."

Audio Jack - 3.5mm TRRS (SMD)
OOD!
Price: $1.65
View
Availability: Back Order
Sparkfun Item #: PRT-12639 -

"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
OOD!
Price: $2.61
View
Availability: Back Order
Sparkfun Item #: PRT-08032 -

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

Audio Plug - 3.5mm
OOD!
Price: $0.87
View
Availability: Back Order
Sparkfun Item #: COM-11143 -

"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."

Audio Shield For DFRduino M0
OOD!
Price: $25.69
View
Availability: Back Order
DFRobot Item #: DFR0420 -

DFRduino M0 Audio Expansion Shield selects the latest full-featured WM8978 of Wolfson as the audio processor. It comes with HI-FI level digital signal processing kernel, supporting 3D surround-sound enhancement and 5 frequency bands balance which can improve the sound quality. With a programmable notch filter, it also can filter noise caused by current noise, etc.Attributing to the plentiful hardware resource on DFRduino M0, we finally can transplant this HI-FI level codec chip to Arduino...

Automotive Jumper 2 Wire Assembly
Price: $4.35
View
Availability: Back Order
Sparkfun Item #: PRT-09923 -

"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. Dimensions: 6" length Documents: Datasheet "

Auxiliary Clip Magnifier for Soldering
Price: $13.03
View
Availability: Stocked-NoBackOrder
Elecrow Item #: EL-TH8875AC -

It is a very useful maintenance tool with magnifier, clip, LED and iron stand. It can play an important role when you weld small SMD components. You can nip the PCB with clip, enlarge it with magnifier and then start to weld. Sometimes, in order to prevent the adjacent pins together when welding the IC with intensive pins, you can use magnifier to enlarge for testing, if the light is weak, you can open the LED.

AVC 2017 Tee - Large
OOD!
Price: $31.20
View
Availability: Back Order
Sparkfun Item #: SWG-14523 -

"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...

AVC 2017 Tee - Medium
OOD!
Price: $31.20
View
Availability: Back Order
Sparkfun Item #: SWG-14522 -

"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...

AVC 2017 Tee - Small
OOD!
Price: $31.20
View
Availability: Back Order
Sparkfun Item #: SWG-14511 -

"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...

AVC 2017 Tee - XL
OOD!
Price: $31.20
View
Availability: Back Order
Sparkfun Item #: SWG-14524 -

"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...

AVC 2017 Tee - XXL
OOD!
Price: $31.20
View
Availability: Back Order
Sparkfun Item #: SWG-14519 -

"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...

AVC 2018 Tee - Large
OOD!
Price: $31.20
View
Availability: Back Order
Sparkfun Item #: SWG-14981 -

"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...

AVC 2018 Tee - XL
OOD!
Price: $31.20
View
Availability: Back Order
Sparkfun Item #: SWG-14982 -

"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...

AVC 2018 Tee - XXL
OOD!
Price: $31.20
View
Availability: Back Order
Sparkfun Item #: SWG-14983 -

"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 XXL, lightweight black T-shirt proudly displays a large “X” (that’s 10 in roman numerals) on a...

AVR 14 Pin 20MHz 8K 12A/D - ATtiny84
OOD!
Price: $5.13
View
Availability: Back Order
Sparkfun Item #: COM-11232 -

"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
OOD!
Price: $7.85
View
Availability: Back Order
Sparkfun Item #: COM-09061 -

"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
OOD!
Price: $4.94
View
Availability: Back Order
Sparkfun Item #: COM-09378 -

"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 Quick Reference "

AVR ISP Shield - PTH Kit
Sale!
Price: $34.69
View
Availability: Stocked
Sparkfun Item #: DEV-11168 -

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
OOD!
Price: $3.39
View
Availability: Back Order
Sparkfun Item #: DEV-09215 -

"This is a handy AVR programming cable that incorporates both the 10-pin and 6-pin ISP programming interfaces. Cable is about 12" long."

Ball Bearing - Flanged (1/4" Bore, 1/2" OD, 2-Pack)
OOD!
Price: $4.00
View
Availability: Stocked
Sparkfun Item #: ROB-13012 -

"These flanged ball bearings fit nicely into a ½" diameter hole and has a ¼" bore. This makes it perfect for all Actobotics channels, hub mounts, or any ½" hole where you need to run a ¼" 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...

Ball Bearing - Non-Flanged (8mm Bore, 22mm OD, 2 Pack)
Price: $4.15
View
Availability: Stocked
Sparkfun Item #: ROB-13277 -

"These non-flanged “608” sized ball bearings fit nicely into a 22mm diameter hole and has a 8mm bore. This makes it perfect for our 2.975" and 4.90" skate wheels. Note: These ball bearings are sold in packs of 2. Documents: Product Page (535034) "