[Size & Quantity: 50 PCS Food packaging coffee pouches empty 5.31×10.43 inch volume of 16 oz/1 lb/500 g double-sided thickness of 28 wires aluminum foil flat bottom resealable side zipper smell proof bags with one-way air valve New Side Zipper: Compared with T-type side zipper new side zipper is simple and easier to tear the overall shape is more smooth and beautiful Upgraded Sealing Performance: New zipper widens the sealing area for better sealing double sealing guards for longer storage time With One-way Air Valve: The One-way air valve keeps the coffee beans and roasted coffee fresh. Excess gas flows from the inside to the outside without returning gas keeping food fresh Food Grade Material: Made from Matte MOPP aluminum foil and food grade PE three-layer composite material design make it stronger block light keeps coffee from odor or moisture ensure the taste of coffee or powder in the bag Functions: Household: Suitable for packaging various products including kitchen ingredients food and other daily necessities; Commercial: You can attach your own brand label on the surface as a retail or sample display package]