The product is a set of four Pokémon TCG cards from the Black Star Promo series, featuring the character Greninja. The cards included are SWSH155, 156, 157, and 158, with the Greninja V-Union card being the rarest and most sought-after among collectors. These cards are United States origin and are highly desirable for any Pokémon TCG enthusiast looking to add unique and limited edition cards to their collection.