Partsam 2xRed + 2xWhite 4" 12LED Stop Turn Tail Brake Backup Reverse Marker Light Flange Mount 12V for Trailer Truck Boat Partsam (2Red + 2White) Sealed Waterproof 12 LEDs light Stop Turn Tail Brake Lamps Reverse Backup Lights for Trucks, Trailer, RVs, and Boats. Acrylic lens is sonic welded to the housing, waterproof lens and housing in a single unit. All-weather molded plastic housing and durable lens protect against corrosion. Outer Diameter: 140mm (5.5''); Inner Diameter: 105mm (4.1''); Height: 24mm (0.9''); Hole Distance: 104mm (4.1'') EASY TO INSTALL: White Wire is the Ground; Red Wire is the high brightness; Black Wire is the low brightness