Check the listing for details. Binditek 100 Pack Plastic Spiral Binding Coils, 16mm(5/8"), 140 Sheet Capacity. Condition: New – Open box. Listed at 15.00 USD. Features & details 140 Sheet CapacityPlastic spiral binding coils measure 16mm(5/8") in diameter, can hold up to 140 sheets of #20 paper. Long-lasting and proven by testing reports, capable of with standing frequent use. 4:1 Pitch & 48 LoopsSpiral binding coils have a 4:1 pitch, making them compatible with any binding machine that punches 4 holes per inch. (Attention: These 4:1 pitch binding coils are not compatible with the Cinch machine.) 360-Degree RotationPlastic spiral binding coils provide a 360-degree page-turning rotation capability for easier reading, allowing bound projects to lay flat. For Letter SizeThese 48-loop binding coils are suitable for letter-sized paper (8.5 x 11 Inches). The length can also be cut with Binditek coil crimpers pliers according to personal requirements. 100 Binding CoilsSturdy plastic spiral binding coils ensures long-term productivity for all your binding projects, allowing you to bind paper sheets with ease and store them for an extended period. Ideal for engineering files, business projects, office documents, and university presentations, they serve as amazing gifts suitable for teachers, students, and coworkers