Partsam 1xRed Stop Turn Tail Brake Marker Clearance Light Assembly Flange Mount 4" 12LED Partsam (1 x Red) Sealed Waterproof 12 LEDs light Stop Turn Tail Brake Lamps 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.