Thank you for viewing. This is an Asuka binding cover. Asuka Asmix Binding cover for personal binding machines A4 Spine width 6mm White BH-307 Transparent cover + Cardboard 5 books x 2 bags Although it is new and unused, it has been stored at home, so please understand this. Also, because the height and width are just barely within the limits for Nekopos, I will put them directly into a Nekopos box, so please be aware of this. If you have any questions, please comment.