LEM Products Oxygen Absorbers 300 CC 5-10 Ct. Packs per unit. Simply drop a packet into the package before closing to eliminate oxygen which helps preserve freshness prevent mold and bacteria growth and extend the shelf life. Each packet will remove oxygen from a 1-gallon bag and removes over 99.9percent of oxygen from each sealed airtight package. Great for freeze-dried powered and dehydrated foods including jerky crackers and grains. Set of 50; these are packed in sets of 10. Once a set is opened vacuum seal any extra absorbers (or store in airtight jar) to maintain effectiveness. Best if used within 2 years. These must be stored in an air-tight glass container; do not store them in a plastic bag. Specifications for LEM Products Oxygen Absorbers 300 CC 5-10 Ct. Packs per unit: Manufacturer: LEM Products Liquid Capacity: 57 oz Fabric/Material: 70percent iron/10percent diatomaceous earth/10percent water/5percent activated carbon/5percent sodium chloride Quantity: 50 Package Contents: LEM Products Oxygen Absorbers 300 CC 5-10 Ct. Packs per unit LEM Products 1349: Oxygen Absorbers 300 CC 5-10 Ct. Packs per unit