Genuine VacMaster 50720 3 Mil 8 Inch by 12 Inch Zipper Vacuum Chamber Pouches Includes: 1000, 8 inch by 12 inch zipper pouches per box Features a re-closeable zipper for more flexible use Heavy-duty 3 mil thick, Nylon/Poly material, BPA-Free and FDA approved Use with Chamber Vacuum Sealers only! Pouches can be frozen, refrigerated, microwaved, boiled, or cooked sous vide