This Boat Trailer Brake Light is designed to replace the Left Hand Side Tail or Brake Light on your trailer, it has the downward facing White LED Light to illuminate your Trailers License Plate and is completely Waterproof so that water cannot enter the enclosed housing and damage any of the electrical components or lights. The Wesbar 8 function Rounded LED Tail Light surface mounts to your trailer (Stainless Steel Hardware is Included) and is completely FMVSS/CMVSS 108 and DOT compliant in all states. This Boat Trailer Tail Light has a 12 inch wire harness with a 2 way flat connector and a ring terminal ground wire. Together with the Matching Right Side Light, this Wesbar Submersible Brake Light helps to perform 8 functions: Brake Light, Tail Light, Turn Signal, Side Marker, Rear Reflector, Side Reflector, Rear Clearance Light and License Plate Light (Left side only). Features: Measures 7 1/2" x 3 1/2" x 3 1/8" 3 Way Plug on the Light with a 2 way flat connector and ring terminated Ground wire 8 Functions: Brake Light, Tail Light, Turn Signal, Side Marker, Rear Reflector, Side Reflector, Rear Clearance Light and License Plate Light (Left side only). Stainless Steel Hardware Included 3 Mounting Holes with 2 inch Center Measurements Each