Black, 100 Pack - Loose Leaf Binder Combs, Mixed Size, 21 Rings, 6mm Plastic Loose Leaf Binder Combs, 20-90 Sheet Binding, A4 [Size] 6mm [Precise A4 Size] Precise A4 hole length and spacing, perfectly aligned on A4 paper, ideal for keeping all pages tidy. [High Quality] High quality PVC resin ensures that these plastic bands won't chip, scratch or fade, and can be reused over and over again. [Flexible and Sturdy] Flexible and sturdy, they make it quick and easy to bind and bind your documents. With these binder strips, your documents can lay flat for easy reading and copying, ideal for presentations. [Easy to Use] Plastic ring binder is the most common and economical binding method. It is easy to make and offers greater flexibility.