An unbreakable thaw temperature indicator tested and used by major breeding organizations. Its accuracy and reliability exceeds the presently used dial thermometer. The Thaw Monitor is based on liquid crystal technology. It is essential if you use the warm water thaw method. Easy to use, hold by corner and run water down the entire thermometer, adjusting water, until number is green within the safe zone. For a final check, submerge entire indicator and hold for 10 seconds before reading temperature. Size: 2" x 4-7/8" L.