Chromatography vials can be distinguished based on size and finish (thread, crimp, snap). They come in clear and amber glass and with or without writing patch. 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