Our standard 2 mL vial is 2 mm in diameter, 32 mm in height, and has a 4.6 mm opening. The thread size on this vial is 8-425. Choice of clear or amber glass. Precleaned or silanized options available. Get Price. 00/pk HPLC Snap Ring Vial Factory Sigma-Aldrich-Aijiren 2ml Sample Vials.