Feature 122mm 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. 210 Pieces in Set: The set contains 10 pieces this binding spines, allowing you to easily store paper and use for a long time. 3Durable 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. 4Good Performance: The binding strip surface is glossy, and has strong adhesion, not easy to break, can turn page smoothly, and can be used repeatedly. 5Wide Usage: Binding strip can be manually bound by punching suitable holes, which can be easily operated by any office staff or student.SpecificationItem Type:LooseLeafBindingSpineMaterial: PolypropyleneInner Diameter: Approx. 22mm/0.9inType: Stationery Accessories Binding Consumables .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List10 x LooseLeafBindingSpine