... 3/4 5/16 rubber seal ring 1)We have kinds of material : NBR,HNBR,EPDM,SILICONE,VITON,NR,FLS, ... produce according to your drawings.We specialize in providing different rubber products, class equipment, advanced management and rich technical capabilities ... ,water seal and rubber gaskets ect.Item nameO RINGSizeCustomized/standard and nonstandardBrand Nameo ringMaterialNBR,HNBR,EPDM,SILICONE,VITON,FLS,FFPM ...