Twin on-board compressor kits were designed to fill the market need for a compact sized yet high-volume compressed air source to suit the high volume airflow needs of most air powered tools, and also to suit the actuation and control needs of the ARB Air Locker, and the harsh and demanding environment of the ARB Air Locker user Constructed Primarily Of Light Weight, High Strength, Engineering Grade Materials Built With Sealed Components For Moisture And Dust Resistance Hard-Anodized Cylinder Bores And PTFE (Teflon) Impregnated Carbon Fiber Piston Seals For Reduced Friction And Maximum Trouble Free Life Anti-Vibration / Sound Deadening Is Integrated Into The Mount Motors Are Internally Thermal Protected Against Extreme Temperature Damage Equipped With Dual Heavy Duty Maxi-Fuses For Professional In-Line Circuit Protection And True Circuit Redundancy In Case Of A Fault Motors Are Water Sealed, 100 Percent Ball Bearing Equipped Limited 2 Year Warranty