This combination roast and oven thermometer comes from Kuchenprofi. The roast thermometer range is 30oC to 100oC and the oven thermometer has a range from 50oC to 250oC. The thermometer is suitable for low temperature cooking. The dial has a diameter of 7.3cm/2.9in with an overall length of 14cm/5.5in. The probe length is 11.5cm/4.5in.