The 2000-S United States Mint 50 State Quarters Proof Set includes 5 uncirculated coins with a denomination of 25 cents each. These coins are composed of copper, with a fineness of 0.5 and were struck with a proof finish at the Philadelphia Mint. The set comes with a Certificate of Authenticity (COA) from the United States Mint, making it a valuable addition to any coin collection. This set celebrates the 50 states of the United States by featuring a unique design for each state on the quarter coins.