Submersible stud-mount stop/turn/tail lights for over 80'' applications. ST-4RB is 7-function: stop, turn, tail, rear clearance, rear reflex, side marker, and side reflex. Eight-function ST-5RB is same as ST-4RB plus license illuminator. Feature built-in rear clearance light, eliminating the need for a separate light to meet DOT requirements. Mounts on 2'' centers. Grounds through mounting studs. Features screw-on, replaceable lens and easy to change replaceable bulb. Shock proof socket guarantees long bulb life. All-weather molded plastic housing and durable lens protect against corrosion. Includes gasket for weather-tight seal. Available as both individual unit and kit. Available in both bulk and colorful retail packaging.