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The standard 4:1. Pitch refers to the holes-per-inch or the hole spacing. It is reflected in a ratio that includes the number of holes, a punctuation colon, and then the inch measurement. For example, 4:1. This ratio is read aloud/pronounced as “four to one” and means four holes for every 1 inch of length. 4:1 pitch binding coil spines are by far the most popular.
Weight | 1 lbs |
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Coil Size |
6 mm (1/4"), 8 mm (5/16"), 9 mm, 7 mm, 10 mm (3/8"), 11 mm (7/16"), 12 mm, 13 mm (1/2"), 14 mm (9/16"), 16 mm (5/8"), 18 mm, 20 mm, 23 mm, 25 mm (1"), 28 mm, 30 mm, 35 mm, 40 mm, 45 mm (1-3/4"), 50 mm (2") |
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$158.34 – $262.47
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