This Kokuyo Campus slide binder features semi-transparent covers with fresh and pastle colours. You can refill this binder with 26-hole filler paper. The touch to open mechanism is another highlight of this product. Just touch and slide down the tab on the bottom of the ring spin. The rings will be opened smoothly, so that you can easily remove or insert and refill sheets. The binder comes with 1 index page, 10 B5 size refill sheets as well as a transparent pocket. While you may purchase additional compatible refill sheets. The binder can accommodate as many as appox. 100 sheets.