Universal 2\" on center stud mounting. Screw-on main and side marker lens allow for easy bulb replacement. This tail light is designed for a variety of under 80\" light-duty trailers. Wiring uses the quick connect and disconnect feature. These tail lights meet FMVSS/CMVSS 108 requirements. 4-3/4\" x 4-1/2\" x 2-9/16\"