Bundle this 5 foot extension hose with your boost leak tester to regulate down your shop air compressor pressure. Conveniently do this carside instead of back and forth to your compressor. Hook up to your boost leak tester once and no need to reach in to the motor. Perfect for pick up trucks or hard to reach areas in the motor and for onboard air supplies that are operating at higher pressures. Uses 1/4" NPT thread and M-type air connections.