Item Type: Plastic Spiral Binding Coils <br>Inner Diameter: Approx. 19mm / 0.75in <br>Type: Stationery accessories binding consumables<br>1、DURABLE WITH LONG LIFE: Durable and sturdy plastic binding spirals allow you to easily compile paper and store for long periods of time <br>2、CONVENIENT BINDING METHOD: Can be manually bound by punching suitable holes, which can be easily operated by any office, student party, and individual <br>3、GOOD GLOSS WITHOUT 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 repeatedly <br>4、19MM INNER DIAMETER: Stationery accessories binding consumables, inner diameter for 19mm, suitable for students and teachers <br>5、20PCS IN TOTAL: The package contain a total of 20pcs binding spirals, enough for you to replace and use, very convenient20&nbsp;x Plastic Spiral Binding Coils