Genuine 30731 VacMaster 3-Mil 12 Inch by 16 Inch Chamber Vacuum Packaging Pouches Includes: 500, 12 inch by 16 inch pouches per box Heavy-duty 3 mil thick, Nylon/Poly material Use with Chamber Vacuum Sealers only! Pouches can be frozen, refrigerated, microwaved, boiled, or cooked sous vide BPA-Free and FDA approved