This product is a lot of 6 boxes containing a total of 72 Ball Wide Mouth Mason Jar Canning Lids. Each box contains 12 lids, and they are made of aluminum and stainless steel materials. These silver-colored lids are designed for vacuum sealing and are suitable for canning. Manufactured in the United States by the brand Ball, these lids are 1.2 inches in height and 3.4 inches in width, weighing 0.22 lbs each. Perfect for preserving your homemade jams, pickles, and other canned goods.