• aluminum foil and polyester film
• 3 Sizes: 20 pcs (7.9''x11.8'', 1 quarts), 20 pcs (10.2''x14.2'', 2 quarts), 10 pcs (13.8''x17.7'', 5 quarts)
• Much Thicker: 8.7 mils (marking according to industry standards, the thickness refers to two layers of the whole bag, the single layer is 4.35 mils, about 15% deviation), prevent tearing, puncture resistance, and light-tight
• Heat Sealable: Apart from a heat sealer, you can also use a hair straightener or a household iron for heat sealing
• Oxygen Absorbers: 60 pcs 400CC, waterproof and oil-Proof, reduce the oxygen content to 0.1% within 12 to 24 hours
• Sticker Labels: 60 pcs, waterproof and oil-Proof, colorful, make it easier to sort and sign