AIR COMPRESSOR PUMP, LUBRICATION TYPE SPLASH LUBRICATED, NUMBER OF STAGES 2, MAXIMUM OUTPUT POWER 5 HP, FREE AIR FLOW RATE @ MAXIMUM PRESSURE 14.4 CFM @ 175 PSI, NUMBER OF CYLINDERS 2, MAXIMUM OPERATING PRESSURE 175 PSI, FLYWHEEL DIAMETER 16 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 1/4 IN