Air Compressor Pump Lubrication Type Splash Lubricated Number of Stages 1 Maximum Output Power 5.5 hp Free Air Flow Rate @ Maximum Pressure 11.1 cfm @ 130 psi Number of Cylinders 2 Maximum Operating Pressure 130 psi Flywheel Diameter 13 3/4 in Flywheel Included Yes Pump Speed 1 250 RPM Construction Aluminum Cast Iron Groove Section A Number of Grooves 1 Valve Type Reed Valve Material Stainless Steel Rotation CCW Stroke Length 2 3/8 in