Ducane Affinity Thermometer Ducane Affinity Thermometer Fits Affinity 3100, 3200, 3400, 4100, 4200, 4400 Stainless steel Ducane Affinity thermometer reads 150F  600F degrees. Probe style with 1-1/4" probe. Includes bezel and wing-nut. Measures 2" in diameter.