The product is a 1966 Topps League Leaders trading card featuring Major League Baseball players Willie Mays, Willie McCovey, and Billy Williams. This sports trading card is part of the 1966 Topps set and is a parallel variety of the base set. Manufactured by Topps in the United States, the card represents the league leaders from the 1966 season and showcases the players from teams such as the San Francisco Giants and Chicago Cubs. It is a valuable collectible for fans of baseball and sports trading cards.