Features: Super Accurate, Super Stable, Super Value For Use with Temperatures Up to 1200 o C (2192 o F) Excellent Long Term Stability at High Temperature Nickel-Chrome Based Super-alloy Sheathing Provides Excellent High Temperature Performance Excellent Oxidation, Carburization and Chlorination Resistance Made with materials of Special Limits of Error. Perfect for calibrating MTI tube furnaces using a precision temperature calibrator (matched with male plug; related product below )