Butyl Rubber Stopper manufacturer / supplier in China, offering Coc, Cop Syringe Piston, Glass Syringe with Barrel for Vaccine, Halogenated Butyl Rubber Stopper for Lyophilized Injectables (Type 20-D2), Halogenated Butyl Rubber Stopper for Lyophilized Injectables (Type 13-D1) and so on.