Binditek 100 Pack Plastic Spiral Binding Coils, 12mm(1/2"),90 Sheet Capacity,4:1 Pitch, Black Spirals

High Quality: Durable and strong plastic spiral binding coils allow you to compile paper sheets with ease and store for a long time. Sheet Capacity: 90 sheets, Spine Diameter: 12mm(1/2 inch), Package Contain: Pack of 100 binding spirals. Dimensions: The 48 loops plastic binding spirals fit letter sized paper(8.5x11.0 inches) All binding spirals have a 4:1 pitch, they will fit any binding machine that punches 4 holes per inch. (Attention: These 4:1 Pitch binding coils can't work on the cinch machine) Ideal For Busy Offices: Plastic binding coils are used in engineer file, business project, office documents, university presentations. Convenience: Binding coils are in lay- flat. 360-degree rotation to add and subtract paper sheets easily.