The 2012 Topps MLB Baseball Factory Sealed Complete Set includes standard-sized trading cards featuring players from the Major League Baseball (MLB). This set, manufactured by Topps in the United States, includes cards made of card stock and is part of the MLB World Series event. One standout player in this set is Bryce Harper, who is highlighted as a rookie card for the 2012 season. The set is sealed in a box and is a must-have for any baseball fan or collector looking to add to their collection of sports trading cards.