<b>Mason Jar Lids - 70mm (Regular Mouth)</b> <br> <br> Airtight and well sealing <br> These canning lids are designed for one-time use. Using them more than once may result in your jars not sealing properly. These lids have a special sealing compound around the rim that is good for one use. <br> <br> You can also use your old lids to top jars of freezer jam, homemade mixes, dried goods, made-from-scratch salad dressings, and other non-canned foods. <br> <br> ●Put away leftovers from dinner <br> ●Preserve food, keep fresh <br> ●Store fermented foods <br> ●Keep sauces and liquids spill proof in the fridge <br> ●Fits: Ball, Kerr and more brand canning jars <br> ●Factors That Affect Seal Closure <br> ●Size: 70mm