The MaxxHaul 50585 LED 4"" 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 stainless steel bezel covered sealed light and putting glue sealed wire for a second layer of defense. The kit includes a pack of 2 bright 4"" inner diameter red LED lights with 5.5"" diameter stainless steel bezel ring to mount on a flat surface, 3 screw holes, complete flange and plug and mounting hardware (6 pcs screws), 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 12V DC vehicles like RVs, 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 brake 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.