1. raw material: nylon coated metal wire 2. calendar, document, book binding 3. Package: 58000 per spool Double wire, wire o, double loop wires are widely used in book, calender binding.Data of Double Loop wire: PitchSizeSPOOL A (loops/spool)SPOOL B (loops/spool)Wire DiameterRecommednded Max.Binding Thickness P3:13/16" (4.8mm)118,000135,0000.65mm3.0mm 1/4" (6.4mm)80000950000.70mm4.0mm 5/16" (7. ...