Durable acrylic lens sonically sealed to base (assures watertight seal). Submersible using the reliable “Bell Jar” principle. Dimensions: 6″ W x 3-1/2″ H x 2-1/4″ D. Mounts flush with standard 2″ mounting bolt pattern. Complies with all DOT requirements for over 80″ trailers when mounted properly. Easily replaceable bulbs. Plated steel hardware included. Includes stop, turn, tail, side marker, rear clearance, rear and side reflectors and LP illuminator.