The product is a set of 4 vintage Pokémon TCG cards featuring the character Mew, released as part of the Wizards of the Coast Black Star Promo series in 2000. These standard-sized cards are made of card stock and are in English, with illustrations by Ken Sugimori. The cards are considered collectible items for fans of the Pokémon franchise and are classified as basic stage Pokémon cards. This set of cards is a rare find for collectors and enthusiasts of the Pokémon TCG.