HIGH CAPACITY - The plastic spiral binding coils have a diameter of 38mm and can hold up to 310 sheets of paper (A4, 70g), allowing for easy addition and removal of pages
4:1 PITCH COMPATIBILITY - The spiral binding coil features 4:1 pitch, making it compatible with any binding machine that punches 4 holes per inch
360 DEGREE ROTATION - With the ability to rotate 360 degrees, this binding coil allows for effortless page flipping and reading, making it easier to work with bound projects
18 PCS SET - Each pack includes 18 spiral coils for binding, ensuring long-term productivity for all your binding projects, enabling you to effortlessly bind papers and store them securely
VERSATILE APPLICATION - The spiral binding kit is Ideal for letter-sized paper (8.5 x 11 inch), the length of the spiral coil can be easily cut with scissors. For engineering documents, business projects, office documents, and university presentations