The 2ml clear snap-top HPLC vials made by Aijiren have openings in three sizes: 8mm, 9mm, and 10mm. The 2ml clear snap-top HPLC vials are usually grouped according to the diameter of the vial, the height of the vial, and the finish of the screw.
These 4ml amber screw top vials are manufactured from superior 51A amber (Type 1, Class AB) or clear glass and feature a 13-425 thread finish. Available in Thermo Scientific™ National™ and Chromacol™ brands.