Archival neutral pH, non-buffered alpha cellulose index tabs to separate slides Enjoy peace of mind for your unique images Lightweight and unobtrusive housing for approximately 2,160 photographs Construction is fortified with metal corner strips to prevent wear and tear Honor and respect the delicacy of film-based acetate while benefiting for easy access Familiar 'box-within-a-box' system safely protects without plastics or material touching the image surface