Nilight 7 Way Trailer Plug with Junction Box. It comes with 8 feet cable and a 7-way blade connector suitable for 5th Wheel, Travel trailer, camper, etc. With a good seal making it is weather-proof and corrosion-resistant. the 7 wires are color-coded and coated with thick rubber-like insulation. It’s ideal for RV travel trailers, caravans, and food trucks.