Archival Methods 6502 Three Ring Binder Box 12.25x13.25x1.5" Made of heavyweight Archival Grade boxboard. The 1.5" O-ring provides the organizational capabilities of a binder while the box enclosure provides much greater protection from dust, dirt and other pollutants than does a standard ring binder. Accommodates most standard 3-ring page formats up to 10.5" X 12.5". Cutaway side provides easy access for page turning. The clamshell design offers double wall protection. Rust proof black metal corners provide stacking strength. Embossed labeling areas on box, accurately and consistently locate and position a standard pressure-sensitive (PSA) identification label.