Features 1. Suitable for Mason Jars:Jar Vacuum Sealer Kit draws air out of the mason jar, creating a vacuum seal to keep food fresh. Jar sealers are compatible with regular and wide mouth mason jars. 2. Environmentally Safe: Our vacuum sealer for jars is made of premium ABS plastic, BPA-free, odor-free, healthy for a human to use, crack-proof, and durable for daily use. easy to clean by hand, dishwasher safe. 3. Keep Food Fresh: With the help of mason jar vacuum sealer kit, you can quickly and easily remove air from mason jars to create a vacuum seal, which keeps food fresh for longer and prevents food from getting moldy, spoiled and wet. Keep your food as fresh as the first day after a week of storage 4. Handly Seal Mason Jars: You can manually seal the mason jars by the manual vacuum pump. The manual vacuum pump is like a mobile vacuum sealer, you can take it with you when you travel or have a picnic. 5. Package Include: Mason jar vacuum sealer kit includes: 2 Wide-mouth Mason jar lid(3.3 inch/8.4 cm), 2 Regular Mouth Mason jar lids( 2.6 inch/6.8 cm), and 1 Manual air pump. Specification Material: Plastic Color: White, Transparent Size: Lid Diameter: 8.4 cm, 6.8 cm Weight: 182g Package Include: 2 Wide-mouth Mason Jar Lids 2 Regular-mouth Mason Jar Lids 1 Manual Vacuum Pump