Feature 1 [High Capacity] With a diameter of 16mm (5/8in), these binding spiral coils can hold up to 140 sheets of paper (A4, 70g), allowing for easy addition and removal of pages as needed. 2 [4:1 Pitch 48 Loop] These spiral binding coils are compatible with any binding machine that punches 4 holes per inch, ensuring a secure and professional binding. 3 [Set of 100] Each set contains 100 binding coils, ensuring long term productivity for all your binding projects, allows for easy and efficient binding of documents. 4 [User Friendly] The binding spirals allow for a 360 degree page flipping rotation, making it easier to read and allowing the bound documents to lie flat when opened. 5 [Versatile Usage] Perfect for engineering files, business projects, office documents, and university presentations, these sheet coils can be cut with scissors to match individual requirements.Item Type: Binding SpiralMaterial: IronBinding Diameter: Approx. 16mm / 5/8inBinding Capacity: 140 Sheets (A4, 70g)Loop: 48Pitch: 4:1 Package List100 x Binding Spiral