This pump free air delivery of 32CFM (900lt/min) at 125PSI. It is a slow revving cast iron pump that is tried and trusted air pump ready to operate in any capacity. This pump has the advantage of producing more air at slower revolution meaning that your pump will last longer and run cooler than a single cylinder or a twin cylinder air pump. These pumps are constructed of cast iron and 100% rebuildable. These are dependable and robust air pumps.