Butyl Rubber Stopper manufacturer / supplier in China, offering Halogenated Butyl Rubber Stopper for Lyophilized Injectables (Type 20-D2), Halogenated Butyl Rubber Stopper for Lyophilized Injectables (Type 13-D1), Halogenated Butyl Rubber Stopper for Sterile Powder for Injection and so on.