About this item Material: the trailer extension cable is made of TPU, waterproof, wear-resistant, high temperature resistant, oil resistant, aging resistant, flame retardant, etc. Trailer extension (7 pin to 13 pin plug). Looped cable pops out for easy storage. Prevents the cable from dragging on the ground while towing. Suitable for 12v or 24v vehicles. Easy installation, powers your caravan, tug and truck, to avoid being disturbed by emergency. Designed to: connect your vehicle's lighting and electricity to the lighting panel of your caravan or trailer. Suitable for trailers with European standards, establishing the connection between the vehicle and the additional trailer and transferring the electronic signal lights from the vehicle to the trailer.