Kaper II ECO Series 1T-400C Trailer Back Up Light 4″ Round – WhiteThis is a sealed, round, flush mount backup light. This clear light measures 4-1/4″ in diameter by 2-1/16″ deep. Lens and housing are one unit that is sonically sealed and waterproof, providing protection to the heavy-duty, long-life bulb. The molded plastic housing and durable lens provide all-weather protection against corrosion. The light features a shockproof socket, guaranteeing long bulb life. This light flush mounts, and a separate, industry standard, two-prong plug is used for the wiring connection. A mounting grommet and plug are included to complete the installation.