Universal Compatibility: This 7 to 13 pin trailer adapter is compatible with the standard 7 pin female trailer socket. Establish a stable and secure connection between your host vehicle and the towing vehicle. Durable Design: Environmentally friendly nylon housing prevents rust and lasts a long time. Thanks to the waterproof protective cap and spring, the trailer socket is suitable for all weather conditions and can remain permanently on the vehicle. Easy installation: Plug this small adapter into the 7 end pins from the car socket and into the 13 pin end of your trailer. After pushing the adapter halfway into the socket, turn it 90 clockwise (1/4 turn to the right), which will complete the installation and secure it. Suitable for European standard trailers: This 7 to 13 pin plug is suitable for European standard trailers. It can power your caravan, trailer and truck. Note: Only for vehicles fitted with 7 pin sockets and trailers fitted with 13 pin connectors.