The product is a 2020 D Jefferson Nickel Error Double Die Obverse Liberty & Reverse Mont 5C coin from the Denver Mint. This coin is composed of 75% copper and 25% nickel, with an apparent/net fineness. It features a double die obverse with Liberty on the front and a double die reverse with Mont 5C on the back, making it a unique and collectible error coin. This coin is circulated and uncertified, making it a valuable addition to any coin collection.