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.