The 2000 Clad Proof Set is a collection of uncirculated coins minted by the U.S. Mint in San Francisco. The set includes denominations of 1 cent, 5 cents, 10 cents, 25 cents, 50 cents, and $1, all made of various compositions such as Copper-Plated Zinc, Copper-Nickel, and Manganese-Brass. This set comes in its original government packaging with a Certificate of Authenticity (COA), making it a desirable addition for collectors of U.S. coins and proof sets.