The Topps 2021 MLB Baseball Series 2 Hanger Boxes contain a total of 67 cards, featuring popular players such as Bryce Harper, Fernando Tatis Jr., and Mike Trout. Each box is made of paperboard and card stock, and includes various exclusive features like Serial Numbered, Hologram, and Rookie cards. The set includes players from various teams like the Boston Red Sox, New York Yankees, and Los Angeles Dodgers, making it a must-have for baseball card collectors. With a mix of parallel, insert, and short print cards, this product offers a diverse selection for fans of the sport.