[Features] ●It can be used in an environment of -40°C to 80°C. ●Drafts up to A1 size can be rolled and stored. ● Storage using dividers is possible as an option (maximum storage number: HDIV4C x 8, TRAY7COMPC x 4). ●It is with a solid lid with a buckle. ●Using about 3.5 times more material than usual, it is very sturdy. ●Stackable.