11mm Wide Opening Vial
2ml crimp sample vial squeeze the septum between the edge of the glass vial and the crimped aluminum cap. This forms an excellent seal against evaporation. During the autosampler needle piercing process, the septum remains in place. Crimping cap vials requires crimping tools to perform the sealing process.
The standard 11.6x32mm profile of 2ml crimp vial is compatible with 11mm aluminum sealing caps. For the selection of seals, see Aluminum Seals. Aluminum caps are generally in primary colors, but there are also composite materials of different colors.