You may need to drill a hole about 4.5″ to flush this tail light in. IP67 waterproof light fixture and effectively withstand the invasion and corrosion of sand, dust, dirt, rain, snow etc. 13.8″ 15 LED Red Trailer Tail Light Bar provides 3rd brake identification lights and surface mounts to trailer: White for ground, black for low brightness tail light, red for high brightness stop turn brake light.