Arrows with front position light HIGHSIDER PROTON TWO with black metal thread. The small dimensions and the possibility to be easily recessed make these arrows practically invisible on the bike. The trend towards ever smaller lighting elements gives the bike a fresh and clean look. No more oversized lighting systems! The right size for discreet but functional arrows. Dimensions: Diameter: 11 mm Width: 12 mm. Depth: 16 mm Thread: M8, length 18 mm Weight: 20g Connections: Yellow = Indicator (+) White = Position light (+) Black = Ground (-) Delivery volume: 1 pair To learn how to connect the resistors to the LED arrows click on the "INSTRUCTIONS" button.