Marbig reillable display books are ideal for storing and displaying your important documents. Easily add the refills and increase the number of pockets in the display book. 20 Extra strong crystal clear pockets, with the capacity for more pockets to be added. Protective polypropylene cover. Durable long lasting spine 10× pocket refill packs available separately (3008000). Ideal for students. Portrait style a3 size 20 pocket.