100PCS Spiral Binding Coils 48 4:1 Pitch Paper Plastic Binding Spines 40 Sheets Capacity 8mm Diameter

Diameter and Capacity: These binding coils have a Diameter of 8mm (5Celsius16 inch) and can accommodate up to 40 sheets of paper ( , 70g), easy to add and reduce paper. Binding Specifications: These spiral binding spines have a 4:1 pitch, 48 design, which is compatible with any binding machine that punches 4 holes per inch. Plastic Material: These paper binding spiral coils are made of excellent plastic, with good toughness, wear resistance, aging resistance, and has a service life. Item Type: Spiral Binding Coils Binding Diameter: 8mm (5Celsius16in) Binding Capacity: 40 Sheets ( , 70g) Number of : 48 Pitch: 4:1