Features 170 SHEET CAPACITY - The spiral binding coil has a diameter of 19mm and can accommodate up to 170 sheets of 70g A4 paper, making it easy to add and reduce paper. 4:1 STEP & 48 LOOPS - The spiral binding coil has a 4:1 pitch and is compatible with any binding machine with 4 holes per inch. The 4:1 pitch ratio of these binding coils allows for easy insertion of pages and provides a clean finish to your bound documents. 100 PCS IN TOTAL A total of 100 spiral binding coils ensure the long-term productivity of all your binding items, allowing you to easily bind paper and store it for a long time. 360 DEGREE ROTATION - The spiral binding coil allows a 360-degree page rotation function, making it easy to read and the binding elements can be laid flat. Applicable size: these 48 loops binding bobbins are very suitable for 8.5 x 11 inch letterhead paper, and the length can also be cut with scissors according to your needs. Very suitable for engineering files, business projects, office documents and university presentations. 1. 170 SHEET CAPACITY - The spiral binding coil has a diameter of 19mm and can accommodate up to 170 sheets of 70g A4 paper, making it easy to add and reduce paper. 2. 4:1 STEP & 48 LOOPS - The spiral binding coil has a 4:1 pitch and is compatible with any binding machine with 4 holes per inch. The 4:1 pitch ratio of these binding coils allows for easy insertion of pages and provides a clean finish to your bound documents. 3. 100 PCS IN TOTAL A total of 100 spiral binding coils ensure the long-term productivity of all your binding items, allowing you to easily bind paper and store it for a long time. 4. 360 DEGREE ROTATION - The spiral binding spool allows a 360-degree page rotation function, making it easy to read and the binding elements can be laid flat. 5. Applicable size: these 48 loops binding bobbins are very suitable for 8.5 x 11 inch letterhead paper, and the length can also be cut with scissors according to your needs. Very suitable for engineering files, business projects, office documents and university presentations. Specification: Item Type: Spiral Binding Coils Material: iron. Binding diameter: 19 mm/0.7 inches Binding capacity: 170 sheets (A4, 70g) Number of teeth: 48 Step: 4:1 Applicable paper size: approx. 8.5 x 11 inches / 21.5 x 28 cm How to use: Remove the product, install and use it Packing List: 100 x Spiral Binding Coils Notice: All data are measured manually and there are certain errors in the measurement results. Package List 100 x Spiral Binding Coils