The product is a lot of 578 basketball trading cards from the 1991 Topps Stadium Club set. Each card is different, making it a diverse and comprehensive collection for basketball fans and collectors. The cards likely feature various players, teams, and moments from the 1991 season, adding to the appeal and nostalgia of this vintage set. Perfect for fans looking to add a piece of basketball history to their collection or for collectors looking for variety and value in their trading cards.