The product is a vintage May 1990 Beckett Baseball Card Monthly featuring Don Mattingly of the New York Yankees, along with other notable players like Gaylord Perry and Bert Blyleven. This illustrated paperback publication is a price guide for sports trading cards, specifically focusing on baseball. With a focus on vintage baseball cards, this publication provides collectors with valuable insights and information on various players and teams from the baseball industry. The Beckett Baseball Card Monthly May 1990 issue is a valuable resource for collectors looking to enhance their knowledge and collection of baseball trading cards.