Dial thermometer with 3-inch face, 3-inch probe, and " MPT threads for installation in a kettle with a " FPT port. The same thermometer included on ourMegaPot 1.2 brew kettles.Easily recalibrate this thermometer using the calibration screw on the back of the dial housing.Also included are the necessary o-rings and hardware for weldless mounting to pre-drilled kettles (requires hole).