A great thermometer at a great price! These thermometers have a 3" Face, a 2.5" Probe, and a 1/2" MPT on the back. The 2.5" Probe works great in a boil kettle or hot liquor tank, however may be too short for a mash tun. Please see our MT514 for the same thermometer with a 6" probe.,,Standard Features:,-All Stainless Construction,-Fast Response to Temperature Change,-Hermetically Sealed (Moisture Proof),-Within 1% Full Scale Accuracy,-Easily Calibrated With a Flat Head Screwdriver,-316 Stainless Steel Stem Material,,Temperature range is 20-240F and 0-110C. Calibration screw is 1/16th" hex nut.