Docooler 13-Pin Trailer Plug 13-Pole Connector 12V Towbar Towing Caravan Truck Plug N Type Trailer End Plastic 100% Brand New and High Quality. Suitable for 13-pin European standard trailer. Establishes a secure connection between your major vehicle and the additional trailer; Transfers the electronic signal lights from the vehicle to trailer. Supplies power to your caravan, towing and truck. Search RavTech for More Wonderful Choices!