Temperature indicator marks surfaces with a chalky and dull marking that changes to see-through and glossy at the rated temperature. Accurate to within 1% of reading. Can be used in in annealing, forging, welding, bonding, forming, and similar applications. This listing is for each. Technical Specification Item Temperature Indicator Stick Temp. Range 450 Degrees F Tip Size 3/8 Tip Style Flat Features When Stick Melts The Precise Temperature is Reached, Reliably Accurate, Melts to Within +/-1% of Rated Temperature, Typical Applications Include Pre-Heating, Annealing, Stress Relieving, Interpass Heat Treatment and Post-Heating Standards Meets .1, ASME Code Sec. I, III and VIII, ANSI/ASME Code B31.1 and B31.3 Includes Slip-Resistant Aluminum Holder with Clip for Easy Storage