200 Pack 3.1x4.7 inch Silver Aluminum Foil Pouch Heat Seal Front Window Plastic
Material: aluminum foil and plastic ; Thickness: 0.08mm (3.14 mil)(one side). Open top, need to use a heat sealer to seal the bag, vacuum, flat, with tear notch, keep products dry. Foil back is very tough and difficult to break and puncture.