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Amazon.com : Rayson SR3111BK Plastic Spiral Coil Binding 7/16 inch, 36 Loops, 3:1 Pitch Black Coil bindings Spines, 100/Box : Office Products
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Plastic Spiral Binding Coil, 45 mm Diameter (1-3/4"), 4:1 Pitch, 12" Long, 350 Sheet (1-1/2") Capacity, Black, 50/Box - Bluebird Office Supplies
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Amazon.com : TOTiyea 100 Pack Plastic Spiral Binding Coils,12mm(1/2") Binding Spirals,90 Sheet Capacity,4:1 Pitch, Black : Office Products
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Amazon.com : Rayson 11.1mm Spiral Binding Coil 7/16inch Standard White Coil bindings Ring 4:1 Pitch 100/Box SBR-100-100-W : Office Products
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Amazon.com : TruBind 10mm (3/8-inch) Binding Coils - COIL10 - Durable - 4:1 Pitch (4 Holes/inch) - 12 Inches Long - Pre-Sized to Fit Letter-Sized Paper - Compatible with TruBind Binding Machines -
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4:1 Plastic Coil Binding | Binding Supplies | Finitura Binding & Finishing, Waukesha, Wisconsin 53188
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Amazon.com : GBC Binding Spines/Spirals/Coils, 18mm, 140 Sheet Capacity, 4:1 Pitch, Color Coil, Black, 100 Pack (9665080) : Office Products
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Coil Binding, 5 Coils Included, Spiral Binding Coil, Notebook Coil, Price per 5 Coils, Flexible Plastic Coil, Many Colors Available - Etsy
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Amazon.com : Rayson SR3143BK Spiral Binding Coil 9/16inch Black Coil bindings Ring 14.3mm 3:1 Pitch 100/Box : Office Products
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