VIAIR Quarter Duty Onboard Air System Designed to actuacte smaller air horns, air lockers and for minor load levelling adjustments. Not intended for tire inflation. Includes all parts needed for installation of you very own onboard air solution for air lockers and small air horns. Just connect your air line into our onboard air system. 120 PSI maximum working pressure and 25% duty cycle. Please note- use thread sealant for proper installation. Thread tape is not recommended. Properly sealed, recommended torque for 1/8 inches is 10 to 11 feet pounds. Recommended torque for 1/4 inches and 3/8 inches is 12 to 15 feet pounds Remote mount air filter assembly, sealed compressor, 2.0 gallon air tank, 90 to 120PSI pressure switch and more! Can be used to inflate helper bags for load leveling, inflate four tires up to 31 inches in diameter or use with heavy duty air horns.