Welcome to our store! 1、280 SHEET CAPACITY: The plastic spiral binding coil has a 32mm diameter and holds up to 280 sheets of paper (A4, 70gsm), making it easy to add and remove pages. 2、4:1 PITCH AND 48 TEETH: The spiral binding coil has a 4:1 pitch and is compatible with all binding machines that punch 4 holes per inch. 3、SET OF 20: 20 spiral binding coils in the package ensure long-term productivity for all your binding projects, making it easy to bind and store paper for an extended period. 4、360 DEGREE ROTATION: The plastic spiral binding coil allows for 360-degree page turning, making it easier to read and allowing projects to lay flat. 5、SUITABLE FOR LETTER SIZE PAPER: These 48-tooth binding coils are perfect for letter-size paper (8.5in x 11in), and the length can be easily cut with scissors according to individual requirements. Ideal for technical documents, business projects, office documents, and university presentations. Item Type: Plastic Spiral Binding Coils Material: PVC Plastic Binding Diameter: Approx. 32mm / 1.26in Binding Capacity: 280 Sheets (A4, 70gsm) Number of Teeth: 48 Teeth Pitch: 4:1 Applicable Paper Size: Approx. 8.5 x 11in / 21.59 x 27.94cm 20 x Plastic Spiral Binding Coils Customers are our top priority. If you find 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.