American Durafilm designs and manufactures to order any size bag in our manufacturing facility located in Holliston, Massachusetts. Every Teflon® bag is made in the USA for any quantity small or large. All heat seals are made on state of the art thermal impulse heat sealing equipment, insuring maximum seal strength. If required, bags can be leak and burst tested with certification. Teflon® bags can be manufactured and packaged inside our new Class 10,000 clean room to ensure their quality and cleanliness, with significantly reduced particulate matter.