lyophilized butyl rubber stopper

• Specification: 13.20mm,etc
• Material: Bromo-butyl or chloro-butyl rubber
• Colour: grey,red,blue,etc
• Advantages: excellent sealing property
• compatibility with medicine,
• less puncture fell crumbs
• Certificate awarded by : china food&medicine supervisionbureau
• Inspection:perfect
• Packaging: by double PE bags after washing