The ZIP-WIRE spiral closures are manufactured from 3/16" to 5/4" (1.25") in size. A 5/4" diameter Zip Wire allows binding blocks up to 29.9 mm thick. All spiral closures are made of highest quality wire in Nylon coating.Windows for three-fold calendars. We manufacture PVC foil windows in 39 sizes for calendars. Our high manufacturing capacity secures orders of over 100, 000 pieces.
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