The MaxxHaul 50586 LED 4 in. Round Stop, Turn, and Tail Indicator Lights are constructed from sonically sealed Acrylic lens, ABS housing material to reflect back direct light for UV protection, corrosion resistance, and long-term heat stability. The lights are designed for waterproof with IP68 grade, shock proof, dust proof, and crack resistance with a rubber covered sealed light and putting glue sealed wire for a second layer of defense. The kit includes a pack of 2 bright 4 in. I.D. red LED lights with 5.5 in. Dia black rubber ring to mount on a 4.65 in. hole, complete flange and plug, and 3-wire connection leads with black as the tail and running light, red wire as the stop and turn light, and white as the ground wire. It fits most 12-Volt DC vehicles like RV's, Campervans, Trucks, Trailers, Boats, Snowmobiles, and can be mounted on the side front, rear undercarriage to function as stop lights, tail lights, turn signal lights, or break lights to aid a safer driving experience for you and other drivers on the road. It is equipped with 12 diodes per light inside to maximize visibility and are brighter and light faster than an incandescent bulb. Easy to install, it is built and produced to comply with D.O.T. FMVSS 108 and IST02 compliant standards for safety and reliability. Material: Acrylonitrile Butadiene Styrene (ABS).