Features 1. 115 SHEETS CAPACITY: The plastic spiral binding coil has a diameter of 14.3mm and can hold up to 115 sheets of paper (A4, 70g), easy to add and reduce paper 2. STEP 4:1 AND 48 RINGS: The spiral binding coil has a 4:1 pitch and is compatible with any binding machine that punches 4 holes per inch 3. 100PCS IN TOTAL: A box of 100 spiral binding coils ensures long-term productivity for all your binding projects, allowing you to easily bind paper and store it for a long time 4. 360 DEGREE ROTATION: The iron spiral binding coils allow a 360-degree page rotation function for easy reading, and the binding elements can be laid flat 5. APPLICABLE LETTER SIZE: These 48 ring binding coils are ideal for letter size (8.5 x 11 inches) paper, and the length can also be cut with scissors as per individual requirements. Perfect for engineering documents, business projects, office documents, college presentations Specifications: Item Type: Spiral Binding Coils Binding Diameter: 14.3mm (9/16") Binding capacity: 115 sheets (A4, 70g) Teeth Quantity: 48 Teeth Ratio: 4:1 How to use: 1. Remove the product from the packaging. 2. Install the product. 3. Once installed, it is ready to use. Packing List: 100 x Spiral Binding Coils Package List 100 x Spiral Binding Coils