CASTAIR 7.5HP 80GAL AIR COMPRESSOR – VERTICAL (PICTURE DEPICTS AIR COMPRESSOR WITH AFTERCOOLER, CONTACT US WITH QUESTIONS) FEATURES: MADE OF ALL CAST IRON FOR LONG LASTING LIFE AND QUIET OPERATION SLOW R.P.M. FROM 420 TO 995 TAPERED ROLLER BEARINGS AT BOTH ENDS OF CRANKSHAFT FOR SUPERIOR SUPPORT & LESS FRICTION PRECISION STEEL CONNECTING RODS WITH AUTOMOTIVE ROD INSERT BEARINGS AT CRANKSHAFT & BEARINGS AT WRIST PIN DISC & SPRING VALVES FOR EASY SERVICE, HIGHER EFFICIENCY AND RELIABILITY PISTONS HAVE 4-RINGS FOR LESS OIL CARRY-OVER CENTRIFUGAL UNLOADER FOR LOADLESS START-UP EVERY TIME