These Loose-leaf Binder Rings are made of high-grade and iron material and are for use. Binders are suitable for many purposes, such as loose-leaf, memo filing, etc. Reusable metal binding ring, can be replaced. They are simple in design, but very practical to use and will give you a good experience. Features - Color: White -Material:Iron - Size: 29.70X1.20X1.00cm/11.67X0.47X0.39in -Suitable for most people, such as students, teachers, and so on. Firm and , so that your desk calendar and notebook in order. -The excellent manufacturing process enables them to have . It is very funny. -These Binder Rings are made of and rigorous manufacturing processes. -The excellent performance of our Loose-leaf Binder Ring will bring you a good experience. -You can buy the professional and practical products at an . Easy to use, just pull open, then squeeze close. Package list: Loose Leaf Binder Rings