The product is a set of 4 boxes of Kerr Sure Tight Regular Mouth Canning Jar Lids, with 12 lids in each box. These silver metal lids are designed for canning and provide an airtight seal to ensure the freshness and safety of your preserved food items. Made in the United States by the trusted brand Kerr, these medium-sized lids are essential for any home canning enthusiast looking to seal their jars securely for long-lasting preservation.