The 2007 Topps Series 1 Baseball factory sealed 22-card Hobby Rack Pack is a collectible sports trading card set featuring players from Major League Baseball (MLB). Each pack contains 22 standard-sized cards made of card stock, with a mix of base set and rookie cards also a possible chance for insert and on card autograph. Manufactured by Topps in the United States for the 2007 season, these cards are part of the MLB World Series event/tournament and are in English language. Perfect for baseball fans looking to add to their collection, this product offers a glimpse into the players and teams of the past MLB season.