The Forney IndustriesFornair 4.5 CRM Air Compressor, No. 555, is built to last with its 4-gallon steel tank for durability and lower rpm output for longer motor and pump life. The air compressor features a built-in moisture separator and an oil-free pump for maintenance free operation. It provides optimal psi (120 maximum psi) to operate pneumatic tools and has large gauges for easy monitoring of tank and line pressure. It also offers an auto on/off option, two built-in 1/4" air outlet quick connects, and includes a wheel kit and luggage handle.