Nichrome heating wire: Cr20Ni80, Cr30Ni70, Cr15Ni60, Cr20Ni35, Cr20Ni30 Product forms and size range Round wire 0.010-12 mm (0.00039-0.472 inch) Other sizes are available on request. Ribbon (flat wire) Thickness: 0.023-0.8 mm (0.0009-0.031 inch) Width: 0.038-4 mm (0.0015-0.157 inch) Width/thickess ratio max 60, depending on alloy and tolerance Other sizes are available on request.