OEMs love our managed inventory and consignment programs! McMasters Koss is a QS 9000/ISO 9002 manufacturer of standard and metric seals, o-rings, gaskets, oil seals, diaphragms, caps and custom-molded shapes in buna, Viton®, silicone, HNBR, EDPM, neoprene, perfluoro and more. We have it in stock!