The extra depth of the Super Satchel? Double Deep allows for storage of larger bulkier supplies. Use open core or customize up to eight compartments for multiple storage options. This box is great for storing scrapbooking papers, card making supplies, fat quarters, paint tubes and much more! It fits inside the Super Satchel? Cube (6855SC) and rolling tote (6822AG). All boxes in the Super Satchel? Series are molded in ACID FREE polypropylene and are stackable. Also accommodates Cone Thread Tray (6901AB), Paint Storage Tray (6828AG), Ribbon Storage Rack (6826AG) and the Marker Storage Tray (6939AB).