Welcome to our store! 1、DURABLE WITH LONG LIFESPAN: Durable and sturdy plastic binding spines allow you to easily compile papers and store them for extended periods. 2、BINDING METHOD: Can be manually bound by punching appropriate holes, which can be easily operated by any office, student parties, and individuals. 3、GOOD GLOSS AND NO BREAKAGE: Features good surface gloss, strong adhesion, wear resistance, rust resistance, aging resistance, not easy to break and fade, smooth page turning, and can be used repeatedly. 4、13MM INNER DIAMETER: Paper accessory binding consumables, inner diameter of 13 mm, suitable for students and teachers. 5、10 PCS IN TOTAL: The package includes a total of 10 binding spines, enough for you to replace and use, very convenient. Item Type: Binding Spines Inner Diameter: Approx. 13 mm / 0.51 in Type: Paper Accessory Binding Consumables 10 x Binding Spines Customers are our top priority. If you encounter any problems with your product after receiving it, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best after-sales service.