Tempilstik temperature indicators features simple -no guages or electronics, easy to use, greater density, holder provides strong grip on the chalk to avoid slippage. Tempilstiks are precise even for the most critical jobs and meet the preheat temperature requirements of AWS D1.1 and other welding code specifications. Approved applications: welding and metal fabrication, preheat, interpass, post-weld heat treatment, annealing. Made in the USA. 10/bx