SAFE MATERIAL - This briefcase is made of high quality, non-toxic and non-radioactive polypropylene, it is an eco-friendly product and it fits everyone. ACCORDION CONSTRUCTION - Its Concertina construction is perfect for coping with the varying amount of sheets between dividers. It contains 24 compartments, which can store at most 3000 sheets. LIGHT AND CONVENIENT - Made of plastic, so this storage binder is flexible and light. It is strong and practical enough to store papers with multi-color labels provided. SIZE - 33*24CM, this suitcase sorter is very aesthetic and functional, which is suitable for A4 size papers, so it can store letters, administrative documents and course sheets. MULTI-COLOR - This accordion in multi-color, BUT it is not transparent, you do not see the writings well when you insert them into tabs.