These A4 binder mechanism are made of good plastic material, not easy to break and in use. They are excellent for binding and filing all types of documents invoices, planners, etc. Widely application, they are suitable for students, teachers, and other people who need them. Features -Color:Transparent -Material:Plastic -Size:31.00X1.20X1.00cm/12.18X0.47X0.39in -Suit for A4 size planner, loose leaf notebook or other A4 size planner with a special design. -Lightweight and convenient, portable and smooth, attractive and reasonable, comfortable to use. -They are designed easy for you to add or remove pages, which is very convenient. -These binder mechanisms the perfect addition to your loose leaf notebook DIY making. -The binders can be applied to sort out small documents, DIY loose leaf book, etc. You can buy professional and practical products at an . Package list: 10 x slide binders