The resistance wire is a specially developed alloy wire that combines consistent heating and excellent corrosion protection to provide alloys for high temperatures up to 1200 °C. They are manufactured from wire gauges such as wire gauges (AWG) or standard wire gauges (SWG), metric or inch diameters, or, more commonly, the specific linear resistance you need, in ohms per meter or ohms. They may be solid, round or flat, stranded or bundled, and may range in diameter from 3.25 mm to 0.06 mm.

Some wires even have a high temperature resistivity, where the resistance increases with increasing temperature, so they have a small "self-limiting" effect. This change in resistance can also be used to allow the temperature of the wire to be reached during the heating cycle to be allowed when the wire is heated by the current or voltage applied to the circuit, allowing for additional temperature or power control.

The resistance wire can be produced according to British standards, such as BS115 - "Metal Resistive Material Specification for Electrical" and diameter less than 0.32mm BS1117 - "Precision Electrical Equipment Bare Resistance Wire Specification" or international standard and customer specifications and requirements.

Line resistance is controlled by utilizing skilled production techniques and closely monitoring the diameter. Drawing through tungsten carbide or diamond wire drawing dies to create high quality products. This is the requirement to accurately draw the correct wire diameter.