VIAIR's Heavy Duty Onboard Air System is a pre-packaged compressed air solution that provides a faster cycle.400C compressor, 2.5 gallon air tank, and all components needed to install a working system capable of inflating tires right out of the box. Please Note: Use thread sealant for proper installation. Teflon tape is not recommended. Properly sealed, recommended torque for 1/8" is 10 ~ 11 ft. lbs. Recommended torque for 1/4" and 3/8" is 16 ~ 18 ft. lbs. Included Parts: Dash Panel Gauge with ON/OFF Switch. Pressure Switch with Relay (110 PSI on, 145 PSI off). Reducer: 1/8 (F) to 1/4 (M). 1/4 175 PSI Safety Valve. 1/4 Drain Cock. (3) 1/4 Compression Fittings. 20ft. 12-Gauge Wire with Inline Fuse Holder. 4 Strip of Continuous Grommet Material. Accessory Airline. Electrical ConnectionsAll Fittings are NPT rated unless otherwise noted. 35ft. Coil Hose with Tire Chuck 1/4 Quick Connect Stud (F) 1/4 Quick Connect Coupler (F) | Viair Corporation Heavy Duty Onboard Air System