Air Compressor Pump, Number of Stages 2, Splash Lubricated, 5, 7-1/2 HP, 19.1, 24.0 Free Air CFM @ Max. Pressure, Max. Pressure 175 psi, Oil Capacity 47 oz., Number of Cylinders 2, NPT Outlet 3/4 In., Pump RPM 1000, 1200, Rotation CCW, Groove Section A, Groove Quantity 2, Flywheel Included Yes, Flywheel Dia. 15 In., Sheave Size @ 1725 RPM 7-51/64 In., 10-13/32 In., Bore Dia. 4-1/8 In., 2-3/64 In., Stroke Length 3-3/32 In., Cast Iron Construction, Painted Green Finish