Temperature Indicator Stick, Accuracy +/-1 Percent F, +/-3 Percent C, Container Type Stick, Indicator Temperature 300 Degrees F, Standards ANSI/ASME Code B32.1 and B31.3, ASME Code Sec. I, III and VII, AWS D1.1, NIST Traceable, Compatible Material Type Iron, Steel, Includes Adjustment Ring, Protective Holder, Shirt-Clip, Process Annealing, Interpass Temperature Monitoring, Post-Weld Heat Treating, Pre-Heating, Stress-Relieving, Tip Width 3/8 in