Preservation Box/Album for slides or negatives. Rust proof, polished black, metal corners provide stacking strength and create a wonderful accent for the heavyweight, acid-free, matte black exterior. Clamshell lid keeps contents protected from dirt, dust and light. The unit opens to expose a soft-white, acid-free interior buffered with 3% calcium carbonate. A 1-1/2" D-ring mechanism holds your slides or negatives firmly in place while the cutaway edge provides easy access for page turning. Accommodates most standard 3-ring page formats. 12 3/4" x 11 3/4" x 2".