3.2 mm (1/8 in) diameter, flexible nylon air lines, are used in order to transfer air under pressure from the automatic level control air compressor to the shocks or inflator solenoid fill valve. The system contains two air line jumpers which go to and from the inflator solenoid, and a crossover air line, which goes to the air shocks. Use snap on connectors in order to attach the air lines to system components and to provide a proper seal. The air lines are flexible for easy handling and routing. Do NOT kink the air lines. Keep the air lines from coming into contact with the exhaust system.