Kits feature the 440 combination rear light with special electrical connections that eliminate external wiring splices. Wiring harnesses simply plug into the back of the lights. The kit provides all legal lighting and reflective equipment for any trailer less than 80" wide. Front side marker lights have built-in reflectors and mount with a single stud. The trailer light kit includes a four wire split harness, frame clips, flexible plastic license bracket, and wire nuts. Wire harness is 25 foot.