The elegant appearance and functional quality defy the economical price. Rust proof, polished black, metal corners provide stacking strength and create a wonderful accent for the heavy-weight, acid-free, matte black exterior. The unit opens to expose a soft-white, acid-free interior buffered with 3% calcium carbonate. A 1.5'' D-ring mechanism holds contents firmly in place while the cutaway edge provides easy access for page turning. Accommodates most standard 3-ring page formats. Portfolio Album Photo Pages sold separately.