This 2016 Topps Opening Day factory-sealed hobby pack contains seven cards, featuring Trea Turner, Corey Seager, and Kyle Schwarber. Rookie cards. The pack is made of card stock material and is a standard size. It is a Major League Baseball (MLB) trading card set, with rookie features, and is in English language. The pack was manufactured by Topps in the United States in 2016. This item is perfect for collectors and fans of baseball sports trading cards.