2ml hplc autosampler vials -Aijiren HPLC Vials. 2ml or 1.5ml hplc autosampler vials are available in a variety of neck finishes and opening diameters. Neck Fishishes: Screw Neck, Crimp Neck, Snap Neck, etc. Opening Diameter: 8mm, 9mm, 10mm, 11mm, etc. 2ml Hplc vial size: 11.6x32mm. 9mm and 11mm hplc vials are the most widely used, compatible.