Universal 2" on center stud mounting. Screw-on main and side marker lens allow for easy bulb replacement. This taillight is designed for a variety of under 80" light-duty trailers. Wiring uses the quick connect and disconnect feature. These taillights meet FMVSS/CMVSS 108 requirements. 4 3/4" x 4 1/2" x 2 9/16". Left/Roadside Wesbar #2823283 also available.