Celebrate 250 years of America and keep your foods freshly preserved with Ball Americana Regular Mouth Mason Jar Lids. Compatible with all Ball Regular Mouth glass Mason jars, these SureTight canning lids offer the sealing quality that canners have trusted for generations, and keep preserves sealed for up to 18 months. Whether you're preserving jam to enjoy for long periods of time or storing freshly made salad dressing for the coming week, these mason jar lids seal in freshness to keep your food tasting great. This 12-piece set of metal jar lids is American made from globally sourced materials. When canning, lids are for one-time use only.