[Universal Size] These lids are 86mm in diameter and fit all regular mouth jar lids, including for Ball and Kerr jars. [Sealing Performance]]The sealing ring inside the lid makes the jar lid with good sealing performance, air tight and no leakage, the tight seal ensures that it is suitable for keeping food, cereals, condiments and drinks fresh [High-quality safe materials] Not easy to rust, high and low temperature .