KOKUYO Copy Paper × 10 books B5, 7mm ruled lines, 32 lines per page, with margin 50 sheets, Copy-21 Although unopened, I opened one book for the photo, and there was deterioration (stains) on the inside of the cover. (I haven't taken them all out.) Please check the condition in the photos. Please understand that this is an old item from the Showa era and has aged over time before purchasing. This is a set of 10 books.