1.Meterial:HNBR ,NBR,EPDM,SI,VITON,NR 2.Wire Diameter: 0.8-12MM 3.hardness: 60-95 Standard,:1. ... .AS568A3. GB/T3452.11)Rubber O-RING NBR o-ring, EPDM o-ring,viton o-ring, Siliconeo-ring,FKM o-ringRubber Seal ring,seal circle ... 3. GB /T3452.11)Rubber O-RING NBR o-ring, EPDM o-ring,viton o-ring, Silicone o-ring,FKM o-ringRubber Seal ring,seal circle ...