EXCITING EASY TO READ GRAPHICS. ChimGard Energy Meter (3-4) Woodstove Thermometer. Durable genuine porcelain enamel with yellow, orange and red zones clearly indicated on black case. Rugged steel case for long life shows safe flue temperatures at a glance. Temperatures up to 900&deg; Fahrenheit (500 Centigrade). Durable genuine porcelain enamel with yellow &amp; orange zones clearly indicated on brown case The top-quality thermometer for stovepipe. Condar 3-4 ChimGard&reg; Flue Thermometer Woodstove NEW