The product is a set of 5 different Ken Griffey Jr Seattle Mariners promo cards from the years 1990. These vintage trading cards are made of standard-sized card stock and feature the MLB World Series. The cards are in near mint condition and are a collectors' item for fans of Major League Baseball and the Seattle Mariners. Each card showcases the talented player Griffey Jr in his early career, making them a valuable addition to any sports trading card collection.