This semi truck air lines kit is designed as a 3-in-1 combo line for connecting air and electrical systems between a tractor and trailer. It includes rubber air hoses, a 7-way SAE-J560 ABS power line, a pre-installed hook, and Teflon tape for easier setup. The spiral-wrapped design helps keep lines organized while reducing tangles and wear. Durable materials such as brass fittings, TPU sheathing, and rubber hose construction support reliable performance in demanding conditions. It is suitable for powering trailer lighting and supporting stable air delivery for semi truck applications.