Partsam 4 Round 4" Stop Turn Tail 2 Amber 2 Red Light Grommet Truck Trailer RV 12V 15LED Partsam (2Red + 2Amber) 4" Round LED Light Stop Light/ Tail Light / Turn Signal Light. 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. Super Bright 15 Diodes LEDs, housing welded together to ensure a permanent and waterproof seal. Rated for 12V, tested to 13.8V; Flush mount Design - Rubber Grommet. EASY TO INSTALL - Comes with three wires: Red for high brightness / White for low brightness / Black for ground wire