Advanced Photo System Prints.
Plus APS 4 x 7 inches and 4 x 10 panoramic prints. Patented Bi-Directional Pockets hold photos horizontally or vertically; memo area next to each pocket; negatives storage page; optically clear pockets securely protect photos; archival, photo safe - acid, lignin & PVC free; book bound album.. Archival acid free - photo safe.