I-Chem® Brand narrow mouth septa bottles available in clear or amber, Type III glass, equipped with the standard, 0.125" thick, I-Chem® blue, PTFE/silicone septa in an open-top 24-414 polypropylene cap. 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 as needed. Amber glass bottles are recommended for UV light-sensitive samples. I-Chem Certified® 200 and 300 Series bottles are guaranteed to meet EPA's Performance Based Specifications for Volatile Organic Analysis. The I-Chem® 300 Series bottles include full laboratory certification. I-Chem® 200 Series bottles are prepared to the same specifications as the 300 Series and are available with a certificate upon request. Not Certified for TOC. I-Chem® 100 Series bottles are made of the same quality materials and to the same specifications as the I-Chem® 200 & 300 Series jars. However, the 100 Series products are neither processed nor certified.