4" Red 10 Diode Stop/Tail/Turn Light Kit. Round, sealed waterproof LED lamp for Trucks, Trailers, RVs, Boats and Trailers. Kit Contains: (1) 4" Red LED Light, (1) Pigtail, (1) 4" Rubber Grommet. Light contains 10 Super Flux Diodes. Very bright and very high quality!. No bulbs to replace - ever!. Use 90% less energy. Safe, dependable service. 100% Maintenance Free!. High impact polycarbonate lens and housing are sonically welded. Meet DOT FMVSS 108 requirements. Length 4". Height: 7/8". Width: 4".