... )Certification:ISO9001,Rosh,War Black Customized NBR round rubber gasket 1)We have kinds of material : NBR,HNBR,EPDM,SILICONE,VITON,NR,FLS ... ,HNBR,EPDM,SILICONE,VITON,FLS,FFPM,PTFETemperatureCommon: 20~50degree centigrade;NBR(-40~120C),ACM(-30~180C),VITON(-25~300C)CertificateCE, ROHS ...