Description Passenger side; Submersible design suitable for many applications; Screw-on lens, easy to change bulbs; Mount on 2" centers; Grounds through mounting studs; Shock-proof socket guarantees long bulb life; Acrylic lens and corrosion proof plastic housing. Signal Light; Combination tail light for over 80" wide trailers Stud mount design, mounts on 2" centers Grounds through mounting studs Shock proof socket extends bulb life Screw-on replaceable lens, replaceable bulb 12VDC