Maintaining optimum temperatures in your compost pile ensures rapid breakdown of material and minimum odor. This thermometer allows you to see whether more or less oxygen is needed, saving you the work of unnecessarily turning the compost. The aluminum dial is divided into sections indicating optimum to poor temperature levels for quick and easy reading. Stainless steel stem has pointed tip for easy insertion. Aluminum dial measures temperatures from 50-F to 180-F in one-degree increments. Dial is divided into three sections indicating optimum, passable and poor temperature levels. 24" stem; 2 1/2" diam. dial.