Provide the user with increased durability and additional length that may be necessary to reach between the tow vehicle's socket and the trailer/towed vehicle's plug. In addition, Flex-Coil Adapters with Nite-Glow illuminate upon activation of the taillight function. This enables the user to find the electrical connection in the dark and show that the vehicle's trailer wiring system is working properly. Great for RVing. 8 ft. stretch. Increased weatherproofing. Tin-plated terminals. Easy-grip connectors. Heavy-duty cable.