LIHIT LAB. A4 book stand that won't fall over even with a single book

A book stand that won't cause the book next to it to fall even if you pull out a book (compatible with new size A4!)
For organizing frequently read books and magazines. For cleaning up picture books and doodle books. For organizing files and notes. The top and bottom stoppers firmly support the book, and the book next to it will not fall over even if you pull it out. Can be connected with joints on both sides without separate parts. Can be used in conjunction with regular size. The back side has non-slip rubber feet. Recommended size: A4 portrait size.
*Minimum compatible height: 120mm (standing is not possible below 120mm because the stopper does not hit sufficiently)
*When the stopper is raised: Maximum height 233mm
*Depending on the thickness of the item you are leaning on, such as items thinner than the thickness of the stopper (8.6mm), it may not stand upright. [Recommended size] Approximately A4 vertical size.