These A6 binder mechanism are made of metal 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:Silver -Material:Metal -Size:18.00X2.00X2.00cm/7.07X0.79X0.79in -This ring binder mechanism is applicable for A6 size loose leaf notebook and planner. Suitable for most people, such as students, teachers, etc., a wide range of applications. -These book binder rings mechanism are made of metal material, , high hardness. -It can help you collect loose leaf together, widely applied in your daily life and work -6 ring design ensures these binder mechanisms, stable and sturdy, can serving you a long time -They are very lightweight and portable, and you can use them at home, school or office, and more Package list: 7 Binder Mechanism