Iso9001 clear vials with caps with high quality for aijiren hplc vials and caps in amber for liquid autosampler with high quality Sigma 100 X Membrane Solutions 2ml HPLC Vials 9-425 Autosampler The vials are almost all made out of neutral glass tubing fo SCHOTT, which have a very low coefficient of expansion at high temperatures, and the vials are manufactured in an ISO 9001 certified.