The Ball 48 Canning Wide Mouth Lids come in 4 boxes, with each box containing 12 lids. These silver-colored lids are made of aluminum and stainless steel, and are designed for vacuum sealing. The wide mouth size makes them suitable for various canning needs. Made by the reputable brand Ball in the United States, these lids are a reliable and essential addition to any kitchen canning supplies collection. Ideal for preserving homemade jams, pickles, and other canned goods, these lids offer a secure and airtight seal to extend the shelf life of your food items.