Incandescent Combination, Thin Line Under 80″ w/ License Light, 4.50″X4.75″. Combination rear light for vehicles and trailers under 80″ wide. Seven Functions: Stop Light, Rear Reflector, Tail Light, Turn Signal, Rear Side Marker Light, Rear Side Reflector, and License Plate Light. Integral Reflex. Grounds through 1/4″ mounting studs. It mounts on 2″ centers and includes mounting hardware. DOT regulatory compliance.