Features: Standard American car, modified trailer plug, suitable for a wide range. Pure copper contact point, good conductivity, the surface nickel, more resistant to corrosion. Environmentally friendly plastic shell. Waterproof seal, to prevent rainy day water. With a lock, to prevent the driving plug due to vibration off. American seven-pin plug, is the standard car accessories, widely used in a variety of trailers and trailers all kinds of trailers. Specifications: Material: PVC Voltage: 12V Applicable vehicles: for trailers, RVs Size: 12.0 * 8.0 * 5.5cm/4.7 * 3.2 *2.2in Package Weight: 246g/8.7oz Package List: 1 * Trailer Hitch Wiring Tow Harness 1Standard American car, modified trailer plug, suitable for a wide range. 2Pure copper contact point, good conductivity, the surface nickel, more resistant to corrosion. 3Waterproof seal, to prevent rainy day water. 4With a lock, to prevent the driving plug due to vibration off. 5American seven-pin plug, is the standard car accessories, widely used in a variety of trailers and trailers all kinds of trailers.