Thermometer has a 3 1/8" dial face with a 3" stem. It is very easy to install, as you just insert the stem through A 13/16" hole on your Grill-Smoker-pit and attach the Installation Kit is included. 3 1/8" Face,stem measures approx 3" long; Color coded Zones; BLUE zone 100-250 Smoke & RED zone 250-350 BBQ; Face reads 100 to 550 degrees Fahrenheit; Heavy Duty Stainless Steel Construction Built To Last; NO-fog glass lens.