... , NBR, SBR, VITON, SILICON, HNBR,etc.square ring rubber Item namesquare ring rubberMaterialNBR,HNBR,EPDM,SILICONE,VITON,NR,CR ... ODMwelcomeOur company produce o-rings (o-ring), waterproof circle, rubber ring, silicon gasket, sealing ring, sealing gaskets,such ... is complete, the stock inventory 8.) the mature technology, stable quality9.) Green environmental protection10.) meet the demand of sustainable ...