1.Huge Capacity: holds up to 600+ top loaders or 135+ magnetic card holders, it's also hold various card slabs, trading card storage box can meet the collection needs of different card types. It's convenient for you to carry, pack all the cards in a box, easy classification and management. 2.Maximum Protection: each sports card storage case includes a Lock with 2 Spare Keys, the combination of rugged hard shell and soft insert makes it has good shock, dust-proof and moisture resistance, avoiding loss, creases, and tears. absolutely room for your premium collection. 3.Premium Storage: our toploaders storage box have plenty of room to store all your cards, the sports card case is specially designed for top loaders, say goodby to toploaders in a mess. This box was the perfect size and configuration for 3x4 inches toploader or magnetic card holders. 4.Essential Kit for Card Collectors: if you are a card collection enthusiast, please have it, give your beloved card a home, let it protect the card for you, and maintain the value of the card for a long time.