Comes with (Pack of 24). Canning rings are an indispensable product for small businesses and home cooking alike! They are used in canning to seal off jars and help preserve food for years to come, protecting them from air, dirt, and spoiling. These packs include 8 canning ring tighteners that you can use with your existing snap lids. Simply place a snap lid on top of a full jar, tighten one of these canning rings around them, and you're good to go! Your food will stay fresh and preserved until you're ready to open it again. Perfect for homes, businesses, jams, jellies, preservatives, homemade products, and more. Storing away your most essential food just got a lot easier thanks to Metal Canning Preservation Rings!