Ball Regular Mouth Lids with Bands for preserving fit all regular mouth glass preserving jars.Seal in the freshness and enjoy freshly made foods tonight or tomorrow.Lids are for one-time use only.Bands can be reused.Includes 12 lids with bands per box, total of 24 lids and bands.Constructed out of tinplate steel, Ball Bands and Lids are the only reliable canning lids and bands around! Apply the bands until they are screwed down firmly and evenly, until fingertip tight.Ball Regular Mouth Lids with Bands for preserving fit all regular mouth glass preserving jars.