Welcome to the store! 1、DURABLE & LONG-LASTING: These durable and robust plastic binding spines allow you to easily compile papers and store them for a long time. 2、BINDING METHOD: Can be manually bound by punching appropriate holes, which can be easily done by any office, student party, or individual. 3、GOOD GLOSS & NO BREAKAGE: Features good surface gloss, strong adhesion, wear resistance, rust resistance, aging resistance, not easy to break or fade, smooth page turning, and can be used repeatedly. 4、13MM INNER DIAMETER: Office supply binding consumables, 13mm inner diameter, suitable for students and teachers. 5、10 PCS 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. 13mm / 0.51in Type: Office Supply Binding Consumables 10 x Binding Spines Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will give you the best solution!