4-5 HP Replacement Single Stage 3 Cylinder Air Compressor Pump Three cylinder cast iron single stage air compressor pump. This is a 4-5 horsepower pump that will deliver up to 10-12 CFM depending on the RPM. This pump is most commonly used on compressor tanks about 60 gallons in size and can be used with 220-volt 4-5 horsepower electric motors. To verify your motor is large enough, it should be around 17-22 amps at 220 volts. All specifications listed on pump-spec plate are ratings at minimum horsepower and RPM. This pump comes complete as shown in the photos, including intake filters and flywheel. See specifications below for more details. Features: Cast Iron Cylinder and Crankcase Equipped with Sight Glass for Easy Viewing of Oil Level Comes with Three Intake Filters Low Oil Consumption Specifications Three Cylinder Single Stage 4-5 HP Cylinder Diameter: 65mm Maximum Recommended Working Pressure: 115 PSI Recommended RPM: 1000-1200 CFM: 10-12 Max Flywheel Diameter: 10.5" Mounting Hole Dimensions Center to Center Front to Back: 5.2" Side to Side: 8.43"