A thermometer is an essential tool for cheesemaking, as cheese is very temperature-sensitive. Our thermometers have a large, easy to read display. Temperature range is 100 - 350 F and 50-175 C , in 5 degree increments. The attached red ball is made of wood, so it always stays cool enough to touch. The metal clip allows you to clip it right to your pot for convenience. Unit Dimension is 215*20mm