This storage system is designed to hold the base game along with the Hero Box 1 and Wulfsburg expansions (Please note, if you do not have these expansions the trays won't stack properly as they lay on top of the player plastic trays - I would suggest getting the first version if you don't plan on purchasing expansions). It also fits sleeved cards. It is composed of (7) trays. (2) very small trays hold the player disc and markers for the character tray and figure. Another tray holds all the heroes while another holds the zombie/monsters. Another tray holds the mini cards (sleeved) and various other components.