The product is a 1987 Topps Tiffany Mark McGwire #366 trading card graded PSA 9 Mint, featuring the player from the Oakland Athletics team. This card is part of the Tiffany parallel variety set manufactured by Topps in 1987. It is a valuable collectible for baseball fans and collectors of sports trading cards, especially those interested in Mark McGwire and the Oakland Athletics team from that season.