Air Compressor Pump, Lubrication Type Splash Lubricated, Number of Stages 1, Maximum Output Power 3 hp, Free Air Flow Rate @ Maximum Pressure 7.9 cfm @ 135 psi, Number of Cylinders 2, Maximum Operating Pressure 135 psi, Flywheel Diameter 10 in, Flywheel Included Yes, Construction Cast Iron, Groove Section A, Number of Grooves 1, Valve Type Reed, Valve Material Stainless Steel, Rotation CCW, Stroke Length 2 in