Thermco B500FW3BLS ACCU-SAFE Blue Spirit Filled Non-Toxic Thermometer, 20 to 500&deg;F Range, 2&deg;F Division, 76mm Immersion, 405mm Length Non-Toxic Biodegradable Liquid & Dye Easy to Read Blue Liquid Each Thermometer Serialized Certificate of Accuracy Included Several Ranges and Sizes