Check the listing for details. 12mm(1/2") Spiral Binding Coils, 30 Pcs Spirals 85 Sheet, Blue. Condition: New. Listed at 19.93 USD. These plastic spiral binding coils are suitable for various office occasions and provide great convenience for file storage, file binding, paper collection, etc. It is a portable product for office and study.SpecificationInner diameter: 12mm / 1/2 InchLength: 279mm / 11 InchCoil Spacing: 9.5 mm / 0.37 InchNumber of binding pages: 85Material: PP PlasticColor: BluePacking List: 30 Pcs Plastic Spiral Binding CoilsAdvantageThe spiral binding coils are made of long-lasting, strong plastic to ensure long-term productivity for all your binding projects, allowing you to easily bind papers and preserve them for a long time.InstructionYou can freely trim the length of the coil according to the number of holes you want to punch. Binding spirals provide a 360-degree page-turning rotation capability for easier reading.