... ringSizeCustomized/standard and nonstandardBrand Nameo ring.MaterialNBR,HNBR,EPDM,SILICONE,VITON,FLS,FFPM,PTFETemperatureCommon: 20~50degree centigrade;NBR ... (-40~120C),ACM(-30~180C),VITON(-25~300C)CertificateSGS /ROHS/FDAColorRed, Black, White, ... and ODM are available2.100% NBR,HNBR,EPDM,SILICONE,VITON,NR,FLS,FFPM,PU,PTFE etc silicone ... contact us feel free . OEM rubber gasket