Palmer 3AP2.5-40/160F&C All Pro Welded Stainless Steel 304 Dual Scale Bimetal Thermometer, -40/160 F and -40/71 C Range, 3" Dial, 2-1/2" Stem, 1/2" NPT Connection, All-Angle Mount Economical Bimetals are legible and accurate. External Calibration Mechanism allows for recalibration. Anti-parallax dial design with linear scale to minimize reading errors. Dual scale model has both Fahrenheit & Celsius scales One Year Limited Warranty