Bankers Box® System Storage Boxes, are made from 100% recycled board and are double sided at the two end panels and the base to ensure additional strength as a heavy duty box. This enables up to six boxes to be stacked on top of each other, saving storage space. With Fastfold® automatic assembly technology these boxes can be assembled quickly and easily, enabling you to save time where you have a large number of boxes to assemble. This box is designed to store your A4 or foolscap ring binders, lever arch files, system transfer box files and computer listing paper.