The 2013 Topps Opening Day Baseball Sealed Box contains a total of 11 packs per box, with each pack containing 7 baseball trading cards. The cards are made of standard card stock material and feature players from Major League Baseball (MLB). This set is manufactured by Topps and is from the 2013 season, making it a valuable item for collectors and fans of baseball memorabilia. Each pack has a chance to include autographed cards, adding to the excitement of this sports trading card collection.