【Almost Unused】 This is The Cube, a recommended textbook from Sapix. By cutting cubes from various directions and examining the shapes of the cross-sections and their relationship to the unfolded diagrams, you can learn using your eyes and hands. It cultivates the ability to handle solid geometry problems frequently seen in the most difficult and difficult schools. 1) 9 types of cube blocks … Used a few times 2) Unfolded diagrams (with cutting lines) 9 types … Unopened 3) Unfolded diagrams (blank) 11 types … Unused 4) Hard clear case 1 type … Some cloudiness 5) Instruction manual The acrylic unfolded diagrams, which can be written on with water-based pens, have no writing on them. The hard clear case has some cloudiness, but I think it will not affect usage. There are fine scratches on the transparent part of the outer box. Other than that, there are no noticeable stains or scratches, but please consider this item as a used item stored at home.