Material: DuPont Teflon® 10.0mil FEP, Type ABeaker Liners made with Teflon® film for Gravimetric Procedures are an alternative to Glass Beakers. Custom manufactured thermoformed Cylinders made with Teflon&erg film. As stack emissions are reduced due to more efficient control technologies, more laboratory analysts are recognizing the utility of Teflon® Baggie for gravimetric measurements of stack gas samples.Teflon® Baggies are an alternative to glass beakers when processing samples from a Method 5-type sampling train or cascade impactor with numerous advantages - no recleaning costs - disposable - transparent - chemically inert surfaces - smaller sample-to-container weight ratios for accurate measurements - unsurpassed archival abilities avoiding sample loss and container deterioration - pliable and unbreakable - extreme temperature resistance All Teflon® Baggies are produced using DuPont Teflon® 7.5mil or 10.0mil FEP film through the process of thermoforming. If you require a custom size we're more than willing to design something for you. Contact one of our Sales Engineers to discuss your custom Teflon® Baggie needs.For more information, please visit Welch Fluorocarbons products webpage.