Binditek 60 Pack Plastic Spiral Binding Coils, Multi Size Binding Spirals, 3:1 Pitch, 36-Loop Black Binding Spines for Lettersize (8mm+10mm+11mm+14mm+16mm)

• Multi Size For Different Needs: There are 5 sizes of black binding coils in this set, 15Pcs of 5/16"(40 sheet capacity), 15Pcs of 3/8"(75 sheet capacity), 10Pcs of 7/16"(80 sheet capacity), 10Pcs of 9/16"(115 sheet capacity), 10Pcs of 5/8"(140 sheet capacity), allow you to bind paper sheets with ease and store for a long time.
• 3:1 Pitch & 36 Loops: Spiral binding coils have a 3:1 Pitch, compatible with any binding machine that punches 3 holes per inch.
• 60 Per Box: A box of 60 spiral binding coils ensures long-term productivity for all of your binding projects, allows you to easily add and subtract paper sheets.
• 360 Degree Rotation: Plastic Spiral Binding Coils allow 360 degree page-turning rotation capability for easier reading, bound projects can lay flat.
• For Letter Size: These 48-loops binding coils are perfect for letter sized paper (8.5"x11"), the length also could be cut by scissor in personal requirement. Perfect for engineer file, business project, office documents, university presentations.

5 Colors For Maximum Efficiency: There are 5 colors of plastic binding coils in this set, each color for 10pcs, include Red, Blue, Yellow, Green, Pink, Organize different types of files by color-coding for quick and easy identification.