... performance is good 3.Different size Flame retardant silica gel ring O ring UsageMainly used for the automobile industry, ... seal and rubber gaskets ect. Item nameFlame retardant silica gel ring O ring SizeCustomized/standard and nonstandardBrand NameFlame retardant ... silica gel ring O ring MaterialNBR,HNBR,EPDM,SILICONE,VITON,FLS ...