Material: The trailer extension cable is made of TPU, waterproof, wear-resistant, high-temperature resistant, oil-resistant, aging-resistant, flame-retardant, etc. Trailer extension cable (7-pin to 13-pin plug). Coiled cable unfolds for easy storage. Prevents the cable from dragging on the ground during towing. Suitable for 12V or 24V vehicles. Easy installation, powers your caravan, tow truck and truck, to avoid being disturbed by emergencies. Designed to: Connect your vehicle's lighting and electrics to the lighting panel of your caravan or trailer. Suitable for European standard trailers, establishes the connection between the vehicle and the additional trailer and transmits the electronic signal lights from the vehicle to the trailer. Quality Assurance: Our products have undergone strict production and processing and quality assurance. If you encounter any problems during your use, please do not hesitate to contact us and we will do our best to solve them for you.-1