This storage system is composed of (10) inner trays and is designed to hold premium sleeves. (6) of the trays hold player pieces (including player-start cards) that lay on top of rails. Cards are removed by pushing down on one end of the cards (seen in the picture) and hold player pieces underneath. There are additional player trays and room left in this insert for possible expansions.NOTE: This insert will hold all of the components of the Sunken Treasures expansion although it will not hold the game board. If you only plan on storing one game board you can still make this purchase. If you'd like to store both game boards you may consider looking at our version 2 listing of Clank located here.