Wilson Jones Heavy-Duty D-Ring Binder w/Extra-Durable Hinge, 3 inch Cap, BlackHeavy-duty binders feature an extra-durable hinge and are made of custom-formulated, PVC-free polypropylene. Polypropylene binders last up to 10x longer than vinyl binders. Built to last, these binders feature three never-gap D-rings for secure and snag-free paper storage. Binder has two interior pockets. Capacity Range [Max]: 3"; Sheet Capacity: 660; Color(s): Black; Binder Sheet Size: 8 1/2 x 11.