This bullet light features a 12 volt, dual filament bulb so it could be used as a running & brake light or marker light. 2-1/4" in diameter. It has a threaded post and nut with rubber mounting gasket so you can get it on your scoot in no time flat. This light is grounded through the mount and has two wires, one for your running light and one for the brake light. Chromed steel with plastic lens. This light has a 2 1/4" diameter lens, and a housing depth of 2 1/2". The mounting stud is 5/16"-18. Sold Individually.