13 PIN TO 13 PIN This trailer extension cable is used for the electrical connection between the vehicle and the trailer or caravan with a 12V power supply to transmit the light electronic signals from the car/vehicle to the trailer. Coiled Harness: 3m cutting length, 2.5m working length, provides extra length needed for tight turns with trailers. Safely lift the coiled cord off the ground to prevent it from fraying on dirty ground. The polyurethane (TPU) outer shell not only prevents rust and corrosion, but also maintains its elasticity and flexibility at low temperatures. HIGH QUALITY: Pure copper pins and tin-plated terminals ensure excellent conductivity. Heavy-duty nylon connector body and the plug has a rubber dust cover to prevent dust and moisture. Wide Applications: The coiled extension cord with towing adapter is suitable for most European caravans/motorhomes/tractors/trailers/cars/trucks/semi-trailers. Customer Service: Enjoy a smooth and worry-free return service within 1 month. If you have any questions, please feel free to contact us, we are here for you.