REOTEMP AA0901F49 Stainless Steel Bi Metal Thermometer, 9" Stem, 1/2" NPT Connection, 3" Dial, 0 to 300 Degrees F, Back Mount All stainless steel welded construction Easy to calibrate reset screw Accuracy 1 percent full scale (ASME B40.3); hermetically sealed (ASME B40.3) Corrosion resistant to most chemicals Standard glass lens