The 2006-S US Mint Proof Set includes 10 coins with denominations ranging from 1 cent to $1, all composed of copper. Minted in San Francisco, these coins are struck in proof quality and come in their original government packaging with a Certificate of Authenticity from the U.S. Mint. This set is a valuable addition to any coin collection, showcasing the craftsmanship and history of United States coins from the year 2006.