The 2017 Topps Baseball Sealed Holiday Mega Box contains 100 baseball trading cards, with a chance to get one autograph or relic card. This set includes cards from players like Aaron Judge, who made his MLB debut in 2017. The box offers a variety of cards featuring players from teams like the New York Yankees, Atlanta Braves, New York Mets, and Los Angeles Dodgers. Manufactured by Topps in the United States, this box is perfect for collectors looking to add some excitement to their sports trading card collection.