This is Kit includes 7 bits WS2812 5050 RGB LED Ring with 40P 2.54mm Single Row Straight Pin Header Male and Test Hook Clip. Perfect for your DIY experiment. 

7 Bits WS2812 5050 RGB LED Ring Lamp Light with Integrated Drivers SK681+ 40Pin 2.54mm Single Row Straight Pin Header Male+Test Hook Clip

Note: UNO is not included.

7 Bits WS2812 5050 RGB LED Ring Lamp Light with Integrated Drivers+ 40Pin 2.54mm Single Row Straight Pin Header Male+Test Hook Clip

Note: UNO is not included.

7 Bits 7 X WS2812 5050 RGB LED Ring Lamp Light with Integrated Drivers
Description:
Voltage:DC4-7V
Communication interface:Single-wire communication
LED Chip:WS2812B
Diameter:23mm

Conncetion:

UNO R3 WS2812
5V 5V
pin 6 Data input
GND GND

FAQ
Q: Can this be stripped to a red, green, and blue wire (+power) to be wired to a different board? "
A:No, the WS2812 is a digital LED, it need to be controlled by a micro controller or AVR (such as an Arduino or ESP8266 board) with a digital pin and appropriate library

40Pin 1X40 2.54mm Single Row Straight Pin Header Male Strip PBC for Ardunio

NOTE: The 2 sides length is same, it is 0.5cm

Pitch: 2.54mm
Gender of Connector: Male
Number of Pins: 40Pin
Type of Row: Single-Row
Type of connector: Straight
Length:10cm
Pin length:0.5cm/each side

Quality Test Hook Clip Logic Analyzer Test Folder For USB Saleae 24M 8CH