The 1998-S US Mint 5-Coin Proof Set includes coins with denominations of 1 cent, 5 cents, 10 cents, 25 cents, and 50 cents, all composed of copper. Minted in San Francisco, these uncirculated coins bear a proof finish and come with original government packaging and a Certificate of Authenticity from the U.S. Mint. This set is a valuable addition to any collector's inventory, showcasing the craftsmanship and quality of American coinage from the late 20th century.