... have kinds of material : NBR,HNBR,EPDM,SILICONE,VITON,NR,FLS,FFPM,etc.2) High temperature and acid-alkali resistance, anti ... /standard and nonstandardBrand Nameo-ring rubberMaterialNBR,HNBR,EPDM,SILICONE,VITON,FLS,FFPM,PTFETemperatureCommon: 20~50degree centigrade;NBR(-40~120C),ACM(-30 ...