FOR TRAILERS UNDER 80'. Universal (right or left) use. All Lexan. Waterproof, air trapping submersible design compresses air, like inverted water glass. Bulb slide has built in dust and splash guard with Hi & Dry terminals, snaps out for serviceable no tool required bulb replacement. Complies with Federal legal requirements. Sonically sealed. Replace any standard 2" mount. Hardware included. 5 year submersible warranty.