These Loose-leaf Binder Rings are made of plastic material and are for use. Binders are suitable for many purposes, such as loose-leaf, memo filing, etc. Reusable plastic binding ring can be replaced. Loose-leaf Binder Rings are simple in design, but very practical to use and will give you a good experience. Features - Color: Black -Material:Plastic - Size: 28.00X3.50X1.00cm/11.00X1.38X0.39in -These Book Binder Rings to meet your daily painting needs and convenient for you to turn pages. -Well polished and smooth surface, will not hurt or scratch your hands. A good binding helper for you. -These binder rings are flexible and convenient to use and storage. It is very helpful. -Manufactured with good plastic material, practical and for use. -Widely applied in home, office, school, and other places in need. It will give you a good experience. Package list: 10 x Binder Rings