... ect.will be available for NSF o-ring Rubber O-Ring1. Offer a wide range of rubber O-ring in all standard ... materials and hardness for your option, including Buna-N (NBR), HNBR, VITON, Silicone, FluoroSilicone, EPDM, Teflon, Natural Rubber, BUTYL, SBR, ... Neoprene, HYPALON, etc. Our represent excellent value for money in terms of quantity, ...