Aluminum-plastic combained flip off cap for sealing 20mm openning pharmaceutical glass bottles.
Firstly put butyl rubber stopper inside glass vial openning and then put flip off cap, lastly crimp the flip off cap tightly.
The flip off cap is made by aluminum alloy and New PP material.
It seals the glass vial perfectly with butyl rubber stopper.
It suitabe for 20mm openning pharmaceutical glass vial.
