The product is a 1988 Topps Tiffany #580 Mark McGwire trading card featuring the player in his Oakland Athletics and St. Louis Cardinals uniforms. As an original insert in the Tiffany set, this sports trading card is a valuable collectible for baseball fans and collectors alike. While not autographed or a rookie card, this piece of memorabilia from Major League Baseball's 1988 season showcases McGwire during his time with the Athletics and Cardinals, making it a sought-after item for fans of both teams.