Features: 2ml sample vial are made of high quality borosilicic acid glass,low content of free ions,low coefficient of expansion and very high chemical resistance.It is suitable for containing all HPLC Vial Autosampler Vials 2ml with Caps, 9-425 Amber Vial with Blue Screw Caps,Writing Patch,Graduation,White PTFE & Red Silicone Septa Fit for LC Sampler(600 pcs,Brown) B081YBM55M