Feature:1. DURABLE WITH LONG LIFE: Durable and sturdy plastic binding spines allow you to easily compile paper and store for long periods of time2. BINDING METHOD: Can be manually bound by punching suitable holes, which can be easily operated by any office, student party, and individual3. GOOD GLOSS AND NO BREAKAGE: Possess good surface gloss, strong adhesion, wear resistance, rust resistance, aging resistance, not easy to break and fade, smooth page turning, can be used repeatedly4. 13MM INNER DIAMETER: Stationery accessories binding consumables, inner diameter for 13mm, suitable for students and teachers5. 10PCS IN TOTAL: The package contain a total of 10pcs binding spines, enough for you to replace and use, very convenientSpecification:Item Type: Binding SpinesInner Diameter: Approx. 13mm / 0.51inType: Stationery accessories binding consumables.Package List:10 x Binding Spines