It is stainless steel and very, as you just insert the through the hole on your pit / smoker / grill and then attach the nut, which is included This thermometer ranges from 100 degrees to 800 degrees in cooking temperature Thermometer Face Diameter: 60mm Total length: 80mm There is a threaded section on the back of the thermometer ( 44mm long that takes a 32mm wing nut ( included Accurately measures temperature inside barbecue grill, Manufacturer: Tsophreniq