Package includes 4 Pieces 4 inch Round Led Stop Turn Tail Lights Red and 2 Pieces 4 inch Round Led fog back-up reverse Lights White, Round rubber Grommets and 3-prong wire pigtails are included for complete installation;These Waterproof round led trailer lights 12 LED serves as the following functions: stop light, turn signal light,tail light(red lights) and Backup Lights or Reverse Lights(White lights); Recessed mount with rubber grommets and Pigtails and accepts standard 3-prong plug; These round tail lights are Approx. 5 inch Grommet Ring and 4" inner diameter and 1 3/16" Thickness, Please drill a hole about 4.5" to install; IP65 waterproof and please do not use it under water;Easy to install: White is the ground, red is the high brightness and Black for low brightness; These 4 inch round led lights are impact resistant and less susceptible to shock damage. Each round trailer light is water-tight sealed. These LEDs draw less current, generate less heat and are brighter and light faster than an incandescent bulb; 12 Volt DC Input;Universal Fit: These round led trailer tail lights are compatible with almost All automobiles and devices equipped with a 8-16 Volt DC power source such as Semi Truck, Semi Trailer, Service Truck, Bus, Service Van, Utility Truck, Enclosed Trailer, Utility Trailer, Boat Trailer, Parade Float, Horse Trailer, Utility Trailer, Pick Up Truck, UTE, UTV Peterbilt, freightliner, international, mack and lorry etc.;DOT/SAE approved and stamped