Made of cardboard, covered with ecological polypropylene film with a canvas structure (100 μm). Inner lining made of surface-finished paper. Capacity up to 750 sheets of 80 g/m². Produced according to the quality of the binders. Indistinguishable from classic binders on the shelf. Adapted to A4 size documents. Has a finger cut-out for easy insertion and removal of the box from the shelf. Includes a removable spine label. Foldable and very easy to assemble.