The 20 individual mason jar wide mouth flat lid disks (83 mm) are officially for single use. However, in combination with our opener, you can carefully remove the lids. As long as there is no rust, damage, or dents on the lid, you can reuse it several times.
 
These lids are only suitable for quart, pint, and half-pint 280ml mason jars or othe jars with a wide mouth.