Item Type: Spiral Binding Coil <br>Binding Diameter: 25.4mm / 1in <br>Binding Capacity: 215 Sheets (A4, 70g) <br>Number of Loops: 48 Loops <br>Pitch: 4: 1<br>1、Coil Specifications: These binding coils have a diameter of 25.4mm (1 inch), and perfect for adding and subtracting paper, with 215 sheets binding capacity. <br>2、360 Degree Rotation: These spiral binding spines allow for 360 degree page rotation, and the binding items can be placed flat to ensure convenient reading. <br>3、Standard 4:1 Pitch: These plastic spiral binding coils have a 4:1 pitch, which is compatible with any binding machine that punches 4 holes per inch. <br>4、Applicable Paper: These 48 loops binding coils are suitable for letter size paper (8.5 x 11 inches), and the length can be cut according to your needs. <br>5、Wide Application: Includes 35pcs binding spines, perfect for engineer documents, business projects, office documents, and university presentations.35 x Spiral Binding Coils