Fuel level sending unit BVMW 1990

Does any one know the gage and Ohms/in of the resistance wires in the fuel level sending unit of a 525i BMW 1990? One of the two resistance wire broke and I want to solder a new wire but I need to find a wire that has the correct gage and ohms/in. I measured the resistance and it's 0.06 OHMS/in. I don't know how to determine the gage.