This long Compost Thermometer provides you the means to check the internal temperature of your compost without getting dirty. The Compost Thermometer is made of rust resistance stainless steel. The Compost Thermometer has a 19 inch probe, 1.75 inch easy read dial, and measures 20 inches in length overall. The Compost Thermometer dial ranges from 0 to 220 degrees Fahrenheit.