Air Compressor Pump Lubrication Type Splash Lubricated Number of Stages 2 Maximum Output Power 10 hp Free Air Flow Rate @ Maximum Pressure 25.8/34.8 cfm @ 175 psi Number of Cylinders 4 Maximum Operating Pressure 175 psi Flywheel Diameter 19 in Flywheel Included Yes Pump Speed 740 RPM Construction Cast Iron Groove Section B Number of Grooves 2 Valve Type Disc Valve Material Swedish Steel Rotation CCW Stroke Length 3 in