QUINCY MODEL 210 ROC 1 AND UP HEAD OVERHAUL KIT AIR COMPRESSOR PARTS QUINCYMODEL 210 (ROC 1 & UP)HEAD OVERHAUL KIT KC210A INCLUDES: 1194 VALVE DISC, 6542 VALVE SPRINGS INTAKE, 8123 VALVE SPRINGS DISCHARGE, 8200 DIAPHRAGMS, 6561 HEAD GASKET, 2134 VALVE GASKETS, 6562 VALVE COVER GASKETS.PART: HOK-210-1-Q To simplify ordering parts for single machine valve and cylinder head repair, head overhaul kits have been assembled with all necessary valve discs, valve springs, unloader diaphragms if required, valve seat gaskets, valve cover gaskets, and head gaskets to recondition valves for one compressor.