... mm 2,USES:used in automatic import of domestic book binding boobinding wire,stitching wire 1, Specification: 0.85 mm - 0.40 mm ... with zinc coatingtensile strength range80kgf/mm2-130kgf/mm2applicationsprinting industry,magazine binding, catalogue, exercise book, and notebook stitching wire(book binding wire)(21#--28#)