The 2006 US Uncirculated Mint Set includes 20 coins from the Philadelphia (P) and Denver (D) mints in their original packaging with folders and an envelope. Each coin is composed of copper and has a business strike type, ensuring it is in pristine uncirculated condition. Certified by the U.S. Mint, this set is a valuable addition to any coin collection, representing the United States coins from the year 2006.