Tempil° Tempilstik Temperature Indicator Sticks Specially engineered for accurate temperature indication in pre-heating, interpass, and post-weld heat treating applications. Available from 100° F (38° C) to 2,000° F (1,093° C). Stick instantly melts at designated temperature for easy and immediate visual inspection. Calibration-free with 100% reliability. Accurate to within +/- 1% of Fahrenheit and +/- 3% Celsius rated Pack of 10