The most common vial sizes for liquid chromatography vials are 12 x 32 mm as well as 15 x 45 mm. Depending on the resource, 12 x 32 mm vials will also be described as 1.5 mL, 1.8 mL or 2.0 mL vials. ND9 Screw neck vials are characterized by a shorter thread which makes them suitable for almost every autosampler, even those with robotic handling.