Tel-Tru 42100414 Model Aa575R Resettable Bi-Metal Process Grade Thermometer, Stainless Steel, 5" Dial, 1/2" Npt Adjustable Angle Back Connection, 0.250" Diameter x 4" Long 304Ss Stem, 0/250 Degree Fahrenheitahrenheit and -20/120 Deg Celsius, +/- 1% Full Span Acc