... & beverage bottle, Butyl rubber stopper, AL-plastic multi-caps, Accessories for dropper bottle. Prefilled glass syringe, Dental glass cartridge. ... three categories,including butyl rubber stopper,Syringe plunger for injuctable cylinder and PP stopper.The butyl rubber stopper production house was ... according to the specification of the syringe.While the PP stopper is mainly used for the airproofling ...