These BPA-free canning jar lids preserve your food for up to 18 months, keeping your food as fresh as the day you made it. Whether you're canning fruit preserves, salad dressing or sauces, Ball mason jar caps seal in freshness to keep your food tasting great. When canning, lids are for one-time use only.Details:SilverAvailable in multiple sizes12 lids with bandsBPA freeMetalFor use with Ball canning jars