Coffee bags constructed with one-way valves help to contain the height of flavorful, aromatic coffees so they smell and taste as good as when first roasted. Our SGC1K Kraft Coffee Bag measures 3 1/8" x 2 3/8" x 10 1/4" and holds 6-7 oz of coffee, teas, and works equally well for specialty food items. The one-way degassing valve vents carbon dioxide and air while limiting external air from entering the bag. The one-way degassing valve is located 3 1/2" from the top of the bag. With a thickness of 5.2 mil, this pouch is constructed with a blend of materials and a durable bottom seal. An aluminum lining provides an excellent barrier to protect against moisture and air. Recommended Heat Sealer: HS6P on high for around 8 seconds.