This is a set of two Kumon binder for English materials. Shipping costs are higher for one binder, but the price is reduced when you purchase two. ❤︎ If you prefer a different combination than this, we can exchange them if we have them in stock, so please comment. ❤︎ If you wish to purchase multiple binders, please consult with us in the comments. The ring-type binder prevents pages from closing on their own. It's very convenient for studying while referring to grammar points and expressions you haven't memorized yet. The worksheets you solve yourself become the best reference books. Also, the material is sturdy, so your worksheets won't get creased when you carry them around. Shipping costs are quite high due to the thickness of these binders. If you purchase other items, we will ship them using the most affordable method, so please consult with us. 《Material》PP Please also take a look at ↓ #Kumon related, children's enjoyable collection If you have any questions, please feel free to comment.