Air Compressor Pump, Number of Stages 1, Splash Lubricated, 1-1/2, 3 HP, 8.5, 10.1 Free Air CFM @ Max. Pressure, Max. Pressure 150 psi, Oil Capacity 34 oz., Number of Cylinders 2, NPT Outlet 1/2 In., Pump RPM 1000, 1200, Rotation CCW, Groove Section A, Groove Quantity 1, Flywheel Included Yes, Flywheel Dia. 11 In., Sheave Size @ 1725 RPM 6-3/8 In., 7-35/64 In., Bore Dia. 2-33/64 In., Stroke Length 2 In., Cast Iron Construction, Painted Green Finish, Valve Material Stainless Steel