Specifications: Material: 304 stainless steel, food grade silicone Color: As shown in the picture Size: Approx.80*91.5mm / 3.1*3.6in Package List: 1 x Bi-metal Thermometer 4 x Fitting Note: 1. Drill a 7/8" diameter hole for weldless installing. 2. To prevent leaking, wrap the 1/2" threads with PTFE tape prior to threading into the port. 3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Dual Scale Dial Thermometer: 0℉ to 220℉, -10℃ to 100℃. Our Dial thermometer monitor show both fahrenheit and celsius. Automatically & Accurately Measure: The temperature sensor is on the 2 inch probe that features high sensitivity. Only the probe touch the liquid or air and so on, our dial thermometer will automatically test temperature. Large Glass Face - Easy to read: Our dial thermometer has a large 3 inch glass dial and clear numbers ,so it is easy to read. Unique 1/2 NPT Thread Design: 1/2 NPT male thread dial thermometer can be installed on 1/2 female thread fitting. This bi-metal thermometer perfect for home brew kettles &stock pots&mash tuns& fermenter and so on. Food Grade Material: The dial thermometer is made of 304 stainless steel. The red washer is made of food grade silicone. So our dial thermometer have good heat resistant & corrosion resistance.