[[Specifications]: 50 pcs flat bottom empty coffee packaging bag.The capacity is 8oz 、1/2 lb 、250g roasted coffee [Preserve Flavor]: 4-layer (competitor 3-layer) one-way valve extends the storage time of roasted coffee beans by 2-3 months [Materials]:The innermost BOPP film and outer aluminum foil not only meets ISO grade standards but also ensures the flavor of coffee beans well [Sealing style] This coffee bag needs to be sealed with a heat sealer.Just ordinary household sealing machine. The sealed zipper design allows the bag to be reused Home: Not only to ensure that the coffee is fresh but also to store other nut snacks and so on; Commercial: You can attach your own brand label on the surface as a retail or sample display package]