2ml Crimp Top HPLC Vials for Sale--Lab Vials Manufacturer. 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. 2ml clear snap top hplc vials for sale.