There rubber stoppers and aluminum plastic caps are suitable for oral liquid bottles, original solution bottles, essential oil bottles, freeze dried bottles, etc. These port rubber stopper may be used in the kitchen, laboratory, ect.

Specification:
Material: Aluminum, Plastic, Butyl Rubber
Suitable for: 13mm Glass Vial
Package list: 100pcs 13mm Flip Off Caps, 100pcs 13mm rubber stoppers

Advantage:
The cover is smooth and burr-free after opening, and the cotton will not get caught . Made of rubber , it is durable, washable and reusable. It forms a good seal and is suitable for long-term storage of liquids or solids.

Instruction :
The flip off seal can withstand high temperatures. This cover is fully tear-off, and when you tear off its plastic cover, the aluminum cover becomes unusable. These rubber caps can be punched with injection holes so that culture media can be injected with an injection needle without removing the rubber stopper.

NOTE: Our store has flip off caps of different styles, sizes and colors to choose from.