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● This rubber stopper is designed for infusion bottles with 34mm neck ring finish.
● The main raw material, butyl rubber, is imported from USA, Germany and Russia.
● The production is finished in GMP standard workshop under strict quality control, and in conformity with National Standard.
● Silicon oil free formula is a new technique. By using as less silicon oil as possible, this formula can effectively reduce stopper skipping problem during sealing process.