11mm closures

Crimp Caps squeeze the septum between the rim of the glass vial and the crimped aluminum cap. This forms an excellent seal preventing evaporation. The crimp cap vial requires crimping tools to carry out the sealing process.

11mm Snap caps provide a secure seal, minimizing evaporation even with volatile samples, the audible click ensures that a secure seal has been formed and the cap is properly applied. Snap caps have septa pre-assembled, Snap caps are compatible with Aijiren Vials and other snap-ring style vials.

The crimp caps of the vials is made of aluminum for crimping and sealing; plastic (polyethylene, polypropylene or phenolic resin) for non-crimping and sealing. The cap gasket is a septum material that is pierced by a syringe needle to extract a sample from the vial. The cap liner sheet has various configurations and is also made of various materials.

11mm Natural Snap-top PE Caps, 6mm Centre Hole
White PTFE/Red Silicone Septa 11*1mm
for 11mm Glass Snap Top Vials

The Cap of Closures in the picture has a Center Hole, which is convenient for Autosampler to perform needle sampling. If you are worried about the difficulty of automatic injection needle sampling, you can also consider purchasing a pre-slit septa. This type of septa is divided into a cut and a cross The two types of incisions are especially useful for blunt circular injection needles.