Vials 1.5ML HPLC, Polypropylene Vial, Polypropylene 2021 - 03 - 24 2mL, Amber Glass, 12*32mm, Flat Base, 9-425 Screw Thread Vial with White Write-on Patch and Graduation Lines. 100pcs/pk. Hplc glass 2ml wholesale chromatography vial Snap Vials in 11mm size provide a secure seal that minimize evaporation, even with volatile samples.