Measures 4″ wide across the light face, at the widest point. Overall length is 10-3/4″, with 9-1/4″ between mounting holes (measured center-to-center). Hardwired with three plain wires – both light colors are a single function. There is one ground wire for both the amber and blue functions, and one hot wire for each color. Includes foam rubber gasket. Does NOT include any mounting hardware. Sold SINGLE.