Optronics ST 17RB. Waterproof universal mount stop/turn/tail lights for over 80″ applications. 8-function: stop, turn, tail, rear clearance, rear reflex, side marker, and side reflex; include license illuminator as well. Features screw-on, replaceable lens and easy to change replaceable bulb. All-weather molded plastic housing and durable lens protect against corrosion. PATENTED replaceable bulb design. Includes separate ground wire.