Constantan wire(CuNi45) wire Size: 0.1mm-8mm Electric heating wire: NI80Cr20, Ni70Cr30, Ni60Cr15, CuNi45, CuNi40, CuNi34 etc. Constantan wire(CuNi40) wireSize: 0.1mm-8mmElectric ... heating wire: NI80Cr20, Ni70Cr30, Ni60Cr15, CuNi45, CuNi40, CuNi34, CuNi30 ...