Cardboard perfectly frames and centers cover for a professional look. Special mounting base on the View Frame Ring Binder keeps the title page in place. Easily insert title page and spine ID with convenient mounting sheets. Improved One Touch EZD closure rings open with ease and keep pages secure. EZD rings hold up to 50% longer than same-size round rings. Cardboard features two clear interior pockets, business card pocket and exposed rivets on back. Large front and back cardboard panels, fully cover standard dividers and sheet protectors. Pages lay flat with back-mounted rings. Cardboard does not contain PVC.