1/2" Male NPT fitting, 4" probe, 3" Dial Diameter and scale of 0°-220°F. A thermometer is an essential tool for accurately following a mash regimen. Upgrade any vessel and enjoy monitoring temperature without opening kettle or mash tun lids to check temperatures! 4" probe length is ideal for use in your Mash Tun or Hot Liquor Tank. Hermetically sealed face. All Stainless Construction. This kettle thermometer requires a 1" hole to be drilled in the vessel and is installed into the side of the pot. Use with the Kettle Thermometer Weldless Kit.