Magnetic Stovepipe Thermometer designed to accurately measure stovepipe temperatures. Indicates overheating (potential chimney fire) or too low of an operating temperature (creosote buildup) with a glance. Designed, engineered and tested for accuracy. Magnetic attachment with safety wire.From the ManufacturerMagnetic Stovepipe Thermometer designed to accurately measure stovepipe temperatures. Indicates overheating (potential chimney fire) or too low of an operating temperature (creosote buildup) with a glance. Designed, engineered and tested for accuracy. Magnetic attachment with safety wire.