As a general rule of thumb add 3mm to the thickness of your book (uncompressed) to choose the correct wire. You can also use our quick selector to find the right wire, based on 80gsm stock with a front and back cover:
You can now use the same 3:1 punching machine and use our specially made 3:1 plastic spirals instead of wire. With 3:1 wire binding you are limited 14mm thickness before requiring a larger punched hole. But with our 3:1 plastic spirals you can now bind up to 45mm, extending the function of your current equipment. Ideal for situations where you have punched a book that is thicker than 14mm as you can now use plastic spirals rather than having to reprint.
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