The product is a 1999 Topps Mark McGwire Home Run Record trading card, featuring his historic 38th and 220th home run with the St. Louis Cardinals. This card is from the original HR Record insert set, manufactured by Topps on card stock in the United States. As a vintage piece from Major League Baseball, it is a valuable collectible for fans of Mark McGwire and the Cardinals, showcasing his impressive home run achievements in the 1999 season.