For use with any foodsaver machine. refrigerate, freeze, microwave, boil wash. vacuum packaging in foodsaver bags and rolls keeps food fresh 3 to 5 times longer. patented channels in foodsaver bags remove air, preventing freezer burn 3-ply material with nylon outer layer seals freshness in, locking air and moisture out. vacuum packaging in not a substitute for canning. bag material is not intended for roasting, baking or broiling. 11 inches x 16 feet