TEMCo Nichrome 80 series wire 18 Gauge 50 FT Resistance AWG ga 18 AWG, Average wire diameter: 0.04 in. (1.016 mm), 0.4002 Ohms/ft at 68F ALLOY: Nichrome 80 (80% Ni, 19.5% Cr, 1.45% Si). Rated for temperatures up to 1180C (2150F). 100% MADE IN THE U.S.A. All TEMCo wire is produced and spooled right here in the U.S.A. PERFECTLY TENSIONED. Zero elongation, scratches or other flaws ensure quality wire on every spool. ZERO CONTAMINANTS. Clean production environment houses the spooling process. Hands-off computerized spooling eliminates skin salts and oils.