Feature 175 SHEET CAPACITY: The plastic spiral binding coil has a diameter of 9.5mm and can hold up to 75 sheets of paper(A4, 70g), easy to add and reduce paper 24:1 PITCH AND 48 RINGS: The spiral binding coil has a 4:1 pitch and is compatible with any binding machine that punch 4 holes per inch 3100PCS IN TOTAL: A box of 100 spiral binding coils ensure long term productivity for all your binding projects, allowing you to easily bind paper and store for a long time 4360 DEGREE ROTATION: Plastic spiral binding coils allow a 360 degree page rotation function for easier reading, and binding items can be laid flat 5APPLICABLE LETTER SIZE: These 48 ring binding coils are ideal for letter size paper(8.5in x 11in), and the length can also be cut with scissors according to individual requirements. Perfect for engineering documents, business projects, office documents, university presentationsItem Type: Spiral Binding CoilsBinding Diameter: 9.5mm(3/8in)Binding Capacity: 75 Sheets(A4, 70g)Teeth Quantity: 48 TeethRatio: 4:1 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List100 x Spiral Binding Coils