Multi-purpose: these mylar bags are suitable for storing food, coffee, tea, dried food, dried fruit, etc.; Suitable for packing, storing, sampling and sorting. Function: you can use heat sealing machine (not included) to seal away from light and oxygen barrier, prevent food being exposed to air, light, odors and moisture, these foil pouch bags can extend the storage time of food. Feature: these foil mylar bags with an aluminum-foil layer can prevent tearing and , puncture resistance, not easy to break leakage, to meet your long term dry storage requirements. Easy to use: there is a U shape tear on the side for easy tear, save time to find a knife or scissors, sealable with hot iron, heat sealing a long term protection, these mylar bags can reseal after opening, lasting for a long time. Colour: silver Material: aluminum foil Package Contents: 10 * 12x17cm aluminum foil bags 10 * 16x23cm aluminum foil bags 5 * 20x30cm aluminum foil bags Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.