Packaging content: You will receive a magnetic furnace thermometer that can control the temperature of the furnace well, and there is enough quantity for you to use Protection function: The furnace thermometer can help protect your furnace from overheating, and the clear marking of your combustion temperature can help you ensure the furnace temperature, allowing you to fully utilize fuel and ensure that you burn fuel at working temperature Easy to use: The furnace thermometer is easy to use and install, and the magnet can be placed back on the top or side of the furnace. The convenient hook can also be used to install the thermometer on the furnace or single wall flue thermometer. Please be careful not to install it directly on the grille Material: The furnace top instrument is composed of an aluminum dial, a bimetallic thermometer sensor, a brass pointer, and a metal handle, which is durable and can be used for a long time, allowing you to obtain accurate temperature Easy to read: There are 2 reading units, with a measurement range of 100 to 900 degrees, a wide range, accurate temperature measurement, and a large dial that is easy to read. The dial indicates the accumulation of creosote, optimal performance, and overheating period to monitor and optimize the efficiency of the furnace