White 4" Round 16LED Stop Turn Tail Reverse Fog Light Truck Trailer Boat Light Flange Mount Partsam (1 x White) 4" Round Sealed White 16 LED Stop/Turn/Trail/Backup Truck &Trailer light Flange Mount w/Chrome Bezels. 16 Super White Diodes for bright, dependable performance; Features sonically sealed, waterproof lens and housing in a single unit. All-weather molded plastic housing and durable lens protect against corrosion; Sealed Waterproof LED Light Universal for Trucks, Trailers, RVs, and Boats. Light Main size: Diameter: 107mm (4''); Height: 35mm (1.4''); Hole Distance: 110mm (4.3'') EASY TO INTALL: Black Wire is Ground; White wire: LED lights up as normal; Yellow wire: LEDs running.