... be produced 3.Quick supply 4.Offer OEM & ODM Product: metric o-ring O-Ring is a kind of sealing products ... in static seal and dynamic seal, 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/nonstandardColorRed, Black, White, Clear ...