The Hopkins Towing Left Side/Drivers Side Combo Trailer Light is designed for all vehicles and trailers under 80 wide. This light provides 7 legal functions to include stop tail turn rear and side reflex side marker and license illumination. Easily replace lens and bulb for convenient maintenance. This light is a stud mount installation (on 2 centers) - the bolts are secured in the molded housing and easily installed into standard trailer frame. Manufacture part # B83 Bulb replacement part #168 and #1157.