Custom 15-element LED board with two phases (brake light and running light) and three wires (ground, brake and running lights).
Includes two 1/4" -20 button head Allen bolts for mounting on Biltwell Model B brackets, custom fender bracket or Model-A style taillight/license plate brackets.
Outside diameter of housing is just over 2 5/8", and the red taillight lens is 1 5/8".
When illuminated, they are easily visible at approximately 300 feet in pitch darkness.