... with reliable quality 2.100% non-tox silicone rubber material. Item namesilicone o ringSizeCustomized/standard and ... nonstandardBrand Nameo ring.MaterialNBR,HNBR,EPDM,SILICONE,VITON,FLS,FFPM,PTFETemperatureCommon: 20~50degree centigrade ... OEM and ODM are available2.100% NBR,HNBR,EPDM,SILICONE,VITON,NR,FLS,FFPM,PU,PTFE etc ... be contact us feel free . OEM rubber gasket