This is a Kumon French language textbook binder. You can close and store Kumon worksheets with this binder. The thickness can be adjusted for 200 sheets or 400 sheets. The string may be black. When you start learning, it's difficult to keep all the vast amount of worksheets, but it's hard to throw them away... so you can file them by textbook. For those who have progressed, their own solved worksheets become the best reference book, so filing them by textbook is a great way to remember old grammar when you get stuck. It fits exactly 200 or 400 sheets, without creating wasted space. Easy to put on a bookshelf. Material: Paper Also see: ↓ #Kumon related, children's enjoyable collection Please feel free to comment if you have any questions.