I-Chem® offers both clear and amber borosilicate glass vials available in three sizes with the standard, 0.125 in. thick, I-Chem® blue, PTFE/silicone septa in an open-top 24-414 polypropylene cap. Amber vials should be used for light sensitive samples. The I-Chem® molded-in septa retainer ring holds the septa securely in place without bonding to the cap, so septa can be removed and replaced