valve oil seal -Material:NBR,Viton,EPDM,PTFE,PU,MVQ... -Good Quality and price -Certification: ISO9001:2001 - ... are welcome3. Materials: NBR, RP, FPM, MVQ, ACM, EPDM, PTFE, MFQ and so on.4. outside diameter from: 8 to ... nameOIL SEALSizeCustomized/standard and nonstandardMaterialNBR, HNBR, EPDM, SILICONE, VITON, FFPM, PTFE, PU, PA etc.TemperatureCommon: -60~260degree centigrade;NBR(-40~120C ...