The resistance wire mentioned may appear in technical-commercial data sheets or catalogues as 'American Wire Gauge' nº 27, i.e. AWG 27, or as Brown and Sharpe Wire Gauge nº 27, B&S 27, having 0.0142 in or 0.361 mm diameter. It is probably of a Fe-Cr-Al ferritic alloy, but several commercial brand names may correspond to this kind of wire. For instance, it may be a 'KANTHAL A' wire, and being that the case, its resistance would be 4.15 ohm/ft at 68 ºF, according to the available technical-commercial literature.
Oddly enough, but from Ebay: Kanthal A-1 is a ferritic iron-chromium-aluminium alloy (FeCrAl alloy) for use at temperatures up to 1400°C (2550°F). The alloy is characterized by high resistivity and very good oxidation resistance.
Typical applications for Kanthal A-1 are electrical heating elements in high-temperature furnaces for heat treatment, ceramics, glass, steel, and electronics industries.