Reciprocating, Two stage, Air cooled Industrial Air Compressor BlockFinger Plate Type Inlet & Discharge Alloy Metal ValvesForged Steel Crank Shaft for Longer Life and Extreme DutiesAluminum Die Forged Connecting Rods for Light Weight Power TransmissionAluminum Alloy Light Weight Heavy Duty PistonsGraphite Alloy Long Life Piston RingsInterstage Air Cooled Copper cooler(s) with Fins for Efficient IntercoolingCopper Discharge Tube for Heat RemovalInter stage air PipingAerodynamic Compressor flywheel for Blasting Cooling Air on Compressor Block and Intercoolers