These rolls are suitable for all suction machines such as, but not limited to Food Saver , Weston and Magic Vacs. These rolls are made of a unique two-sided cross hatch pattern for the fastest and most powerful vacuum of any embossed vacuum sealer product on the market. Made of heat and cold resistant USDA approved and BPA free nylon/polyethylene, this channeled material is suitable for boiling as well as freezing, and is one of the strongest and most durable products available.