... to 13 Pin Socket 2. trailer, towing, caravan, Towbar 3. voltage 12V 4. ISO 11446 5.with CE,ROHS approvaled Trailer Adapter Convert ... 7 pin plug to 13 pin socket Compact Type Use for Caravans, trailer, tractor truck and ... marking plate, trailer plug, trailer socket, electrical coil with good quality and high cost-performance. 7 to 13 Trailer Converter Adapter ...