Partsam 4 Pcs LED Light 2 Diode Red Universal Mount Side Marker Trailer (Size: 2.53 x 1.06 x 0.71 inch) Partsam ( 4 x Red ) Mini-Sealed LED Surface mount design in for clearance, side marker or identification light. Features sonically sealed, waterproof lens and housing in a single unit; Two-wire design includes both lead wire and ground wire for mounting to all surfaces. Universal for trucks, trailers, tractors, semi-trailer, Dump Truck, bus, boat, special vehicle, etc; For Heavy Duty trucks like Peterbilt, freightliner, international, Kenworth, mack,etc. Size: 64mm x 26mm x 18mm (2.52'' x 1.02'' x 0.7''); Hole Distance: 46mm (1.8'') EASY TO INSTALL - 2 Wires Connection: White is Negative and Black is Positive.