TEMCo Kanthal A1 wire 18 Gauge 50 Ft Resistance AWG A-1 ga 18 AWG, Average wire diameter: 0.0403 in. (1.02362 mm), 0.515 Ohms/ft at 68F ALLOY: Kanthal A-1 (22% Cr, 5.8% Al, Fe balance). Rated for temperatures up to 1400C (2550F). 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.