The RingFolio takes the design features and solid construction of Archival Methods Onyx Portfolio Box and incorporates a 3-ring locking binder mechanism with 1-1/2" D-rings. The result is an elegant, fully enclosed presentation binder. The RingFolio accepts pages up to 12 x 10 inches. When opened it lies flat for easy viewing and page turning. 62-150 (with 2-1/2" D-Rings) is bound in textured black buckram with an all-black lining of acid free paper. Box core is Kappa binders board (.100), a bookmaking board with no glue between layers Lined with 80 lb. black acid- and lignin-free paper PAT tested and passed Covered in library quality F-Grade Buckram (poly-cotton) with a moisture-resistant, 100% aqueous acrylic coating Adhesive is pH balanced and buffered <.0008% sulfur content. Resistant, 100% aqueous acrylic coating Reinforced hinge Close-tolerance construction to keep out dust Application Combining the function and utility of a ring binder with the elegance and protection of a portfolio box. Archival Methods Ringfolio Binder Box has many uses beyond storing photos. It is perfect for filing business originals, corporate minutes, by-laws and closings.