The 2026 Topps Heritage Red Border Insert 15 Card Lot includes trading cards featuring players such as Nicholas Castellanos, Sonny Gray, and more from various MLB teams like the Boston Red Sox, Detroit Tigers, and Philadelphia Phillies. Manufactured by Topps, these standard-sized baseball trading cards are made of card stock and are original releases from the 2026 season. The Red Border Insert design adds a unique touch to these collectible cards, making them a desirable addition for baseball card enthusiasts looking to add to their collection.