... supply 4.OEM is ok Product: colored rubber o rings O-Ring is a kind of sealing products which ... main material contains: NR, CR, NBR, SBR, VITON, SILICON, HNBR, PU etc.Item nameO RINGMaterialNBR,HNBR, ... EPDM,SILICONE,VITON,NR,CR,SBR,PUHardness30-100 shore ASizeCustomized/standard/ ... NBR(-40~120°C),SILICONE(-30~250°C),VITON(-25~300°C)Special featuresnon-toxic; oil- ...