The product is a set of ten uncirculated Jefferson nickel proof coins ranging from 1990 to 1999, minted in San Francisco by the U.S. Mint. These coins feature a proof strike type and are all certified by the U.S. Mint. The Jefferson nickels are part of the Coins: US category and are highly collectible for numismatists interested in U.S. coinage. Each coin in the set is in gem condition, making it a valuable addition to any coin collection.