Specially engineered for accurate temperature indication in pre-heating, interpass, and post-weld heat treating applicationsAvailable from 100° F (38° C) to 2,000° F (1,093° C)Stick instantly melts at designated temperature for easy and immediate visual inspectionCalibration-free with 100% reliabilityAccurate to within +/- 1% of Fahrenheit and +/- 3% Celsius rated