The Cap of Snap Vial is Pe Cap, which is soft and easy to handle. 11mm Snap Top Vial for THERMO FISHER Aijiren 2ml 11mm Snap Ring HPLC Vials has a standard scale and writing area for easy filling and identification. 2ml 11mm Sanp Ring HPLC vial can be matched with most autosamplers on the market, such as Aijiren, Thermo Fisher, Shimadzu and other well-known brands.