PATIKIL 13mm(1/2") Plastic Spiral Binding Coils, 20 Pcs Binding Spirals 105 Sheet Capacity 4:1 Pitch Binding Spirals for Binding Paper Sheets, Black

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: 13mm/0.52 inch; Length: 31cm/12.2 inch;Coil spacing: 4:1;Number of binding pages: 105;Material: plastic;Color: Black;Packing List: 20 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.InstructionSpiral binding coils have a 4:1 pitch, making them suitable for any binding machine that punches 4 holes per inch.Binding spirals provide a 360-degree page-turning rotation capability for easier reading.NoteThese 4:1 pitch binding coils are not suitable for machines.