Compost Soil Thermometer by Greenco, Stainless Steel, Celsius and Fahrenheit Temperature Dial, 20 inch Stem DURABLE CONSTRUCTION: Solid 20 inch (508 mm) 0.2 inch (5mm) diameter stem; reinforced welded bolt between dial and stem for long-lasting operation and conditions; high quality 304 stainless steel CLEAR ACCURATE DIAL: Easy to read 2 inch wide dial with color-coded temperature ranges; 40 - 180 Fahrenheit range and -17.77 - 82.22 Celsius in 2 degree increments for accurate readings HIGH QUALITY LENS: High-quality and lightweight PC-coated lens, hermetically sealed to avoid fogging and moisture; IP55 water-resistant rating COMPOSTING INSTRUCTIONS: Included to get you started LIFETIME WARRENTY, 100% MONEY BACK GARDENER SATISFACTION GUARANTEE: We are here 7 days a week, to answer all your questions