The 2026 Topps Series 1 Baseball Celebration Mega Box is a limited edition trading card set featuring MLB. This box includes inserts and parallels such as Gameday Drp, Mascots, Perennial varieties and Rookie cards, all manufactured by Topps. The cards are standard size and made of 20 Pt. card stock, with the autograph of Shohei Ohtani authenticated by Topps. This product is a must-have for baseball card collectors looking to add exclusive and unique cards to their collection from the 2026 season.