Feature:1. 22mm 30 Holes: This is 30 hole loose leaf paper binding strip with an inner diameter of 22mm, which can hold multiple sheets at one time.2. 10 Pieces in Set: The set contains 10 pieces this binding spines, allowing you to easily store paper and use for a long time.3. Durable PP Material: The binding spine is made of excellent PP plastic, there is no harmless, has good wear and rust resistant, anti aging, sturdy and durable.4. Good Performance: The binding strip surface is glossy, and has strong adhesion, not easy to break, can turn page smoothly, and can be used repeatedly.5. Wide Usage: Binding strip can be manually bound by punching suitable holes, which can be easily operated by any office staff or student.Specification:Item Type: Loose Leaf Binding SpineMaterial: PolypropyleneInner Diameter: Approx. 22mm or 0.9inType: Stationery Accessories Binding Consumables.Package List:10 xLoose Leaf Binding Spine