[7Pin Trailer Extension Cable] The 7-pin trailer light wire connector establishes the connection between the vehicle and the attached trailer, and transmits electronic signal lights from the vehicle to the trailer. European StandardSuitable for towing most European cars, tractors, boats, truck brake joints, semi-trailers, box trains and container carriers, connect thisYour vehicle's signal light to the trailer. Easy to AssembleThe 7-pin connector trailer light extension cord male to male is easy to install, powers your caravan, trailer and truck, and protects you from emergencies such as your car breaking down. Waterproof & DurableThis 7-pin trailer adapter is made of high-quality PU/TPU material, the shell is durable, long life, durable, waterproof material, trailer needle extension pull wire is highly elastic, with high toughness and durability sex. Wide Applications7-pinextension cables are suitable for towing cables on most European RVs/RVs/tractors/trailer connectors/cars/trucks/brake joints/semi-trailers/van trains/container carriers.