LavaLock&reg; 3" Adjustable Gas Charcoal Smoker Pit Grill BBQ Thermometer Electric Heavy Duty Stainless 2.5" stem 50 - 550 F adjustable BBQ thermometer 3" adjustable with heavy duty site glass stainless steel LavaLock brand mechanical for durability and easy of use 2.5" stem, 1/2" NPT w/ locking nut