11mm (7/16") Plastic Spiral Coil
Binding Tip: For very thick books, up to 1-3/4", Plastic Spiral Coil is a good choice. The weight of such a large book can cause a wire to bend and de-form. Plastic Spiral Coil is more durable and springs back into shape. And, unlike with Plastic Comb Binding, the pages turn smoothly without catching.
Did You Know?: A pitch is the ratio reflecting the number of holes punched per inch of paper.
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