The product is a 2021 Topps Chrome Mark Mathias Rookie Auto Refractor trading card numbered to 499. This baseball card features an autograph from Mark Mathias of the Milwaukee Brewers, who is a player in the Major League (MLB). The card is part of the 2021 Topps Chrome set and is manufactured by Topps on standard-sized card stock material. This hard-signed autograph card is a parallel variety with a serial number, making it a valuable addition to any sports trading card collection.