Three-cylinder cast iron single-stage air compressor pump. This is a 5-horsepower pump that will produce 22 SCFM and 18 CFM at 90 PSI. This pump is most commonly used on compressors under 60 gallons in size and can be used with a true 5-horsepower motor (these motors typically run at 20-23 amps on 230 volts). This pump comes complete as shown in the photos, including the intake filter and pulley. 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 Specifications Three Cylinder Single Stage Recommended Motor Size: 5 HP SCFM at 1150 RPM (Max RPM): 22 Cylinder Diameter: 65mm Cylinder Stroke: 48mm Pump Flywheel Diameter: 10.5" Working Pressure: 120 PSI Maximum Pressure: 140 PSI Net Weight: 55 lbs Outside Dimension (W x D x H): 18" x 12.5" x 15" 5 HP Replacement Single Stage Air Compressor Pump