The product is a US 1972 Plate Block of 4 Mint Never Hinged 15 cent stamps featuring Mount McKinley (now known as Denali) in Alaska National Park. The stamps are multi-color and in Very Fine/Extremely Fine condition, making them a desirable addition to a stamp collection focusing on nature themes. The certification of the stamps is not specified, but they originate from the United States and are a valuable piece of postal history.