Kingdom Death Monster Insert: - Rules of Play says:
Insert compatible with Kingdom Death Monster®, and the insert has space for a total of 1,300 standard sized cards and 440 gear cards in total. The design provides both efficient storage and improved game play. All of the trays can be utilised during the game, and they greatly aid set-up and clear-away times. The insert works together with the FS-KDM+ insert to store, in addition to the main game, many of the game's expansions.