I'm selling this because I haven't used it much. Retail price: 660 yen The product description is below! ↓ KADONO Omokuri Clip, 2 pieces. Keeps pages in place with weight! Clip for books that gently holds and uses weight to keep pages open! Reduces stress from closing books! Improves study performance by maintaining concentration! Clear type that allows text to be seen through Use two for even more secure page keeping! Great for reference books, cookbooks, planners, and more!