1.Meterial:HNBR ,NBR,EPDM,SI,VITON,NR 2.Wire Diameter: 0.8-12MM 3.hardness: 60- ... . GB/T3452.11)Rubber O-RING NBR o-ring, EPDM o-ring,viton o-ring, Siliconeo-ring,FKM o-ringRubber Seal ring,seal circle,rubber seal ring2 ... /T3452.11)Rubber O-RING NBR o-ring, EPDM o-ring,viton o-ring, Silicone o-ring,FKM o-ringRubber Seal ring,seal circle,rubber seal ring2 ...