... .Different sizes, from DN50-DN300 4.Customized rubber gasket black rubber sealing partsShanghai Yisen Rubber And Plastic Products Co.,Ltd has established in 2000.Goal:we ... ,CR,NABR,SBR,FKM,EPDM,SILICONE etc.,Range of rubber products : Rubber sealing, Piping valve, Gasket,Rubber plant, Oil seal,O-ring, Special Forming parts ...