Air Compressor Pump Lubrication Type Splash Lubricated Number of Stages 1 Maximum Output Power 0.5 hp Free Air Flow Rate @ Maximum Pressure 1.54 cfm @ 125 psi Number of Cylinders 1 Maximum Operating Pressure 125 psi Flywheel Diameter 12 5/8 in Flywheel Included Yes Pump Speed 525 RPM Construction Cast Iron Groove Section A Number of Grooves 1 Valve Type Disc Valve Material Swedish Steel Rotation CCW Stroke Length 2 in