Feature:1. 115 PAGE CAPACITY: The spiral binding coil has a diameter of 14.3mm (9/16in), allowing for up to 115 sheets of paper (A4, 70g) to be easily added or removed.2. 4:1 PITCH AND 48 TEETH: The spiral binding coil features a 4:1 pitch, making it compatible with any binding machine that punches 4 holes per inch.3. 100PCS: Each box contains 100 spiral binding coils, ensuring long term productivity for all your binding projects and convenient storage.4. 360 DEGREE ROTATION: The spiral binding coil allows for easy page flipping and reading, as the bound documents can lay flat and be rotated 360 degrees.5. SUITABLE FOR LETTER SIZE PAPER: These 48 teeths binding coils are perfect for letter size paper (8.5 inches x 11 inches) and can be easily trimmed with scissors according to requirements. Ideal for engineering files, business projects, office documents, and university presentations.Specification:Item Type: Single Loop Wire Binding Spines Material: Iron Binding Diameter: 14.3mm(9/16in)Binding Capacity: 115 sheets (A4, 70g)Number of Teeth: 48 teethPitch: 4:1.Package List:100 x Single Loop Wire Binding Spines