Based in China,Zhengzhou Century Company Ltdis specializing in the manufacturing,research and development of primary packaging.We offer billions of packaging materials for pharmaceutical biotech, cosmetic, veterinary and associated industries every year, which covers tubular injection glass vials, moulded glass injection vials ,glass ampoules and other medical glass tubes, amber bottles, neutral borosilicate glass products, infusion bottles, cosmetics flessen, butylrubber -stoppers en dopdoppen enz.