Optronics ST 16RB. Waterproof universal mount stop/turn/tail lights for over 80″ applications. 7-function: stop, turn, tail, rear clearance, rear reflex, side marker, and side reflex. 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.