Air Compressor Pump Lubrication Type Splash Lubricated Number of Stages 1 Maximum Output Power 5 hp Free Air Flow Rate @ Maximum Pressure 16.5 cfm @ 140 psi Number of Cylinders 4 Maximum Operating Pressure 140 psi Flywheel Diameter 14 1/2 in Flywheel Included Yes Construction Cast Iron Groove Section A/B Number of Grooves 1 Valve Type Reed Valve Material Stainless Steel Rotation CCW Stroke Length 2 in