Sun-Tec Rockwell Hardness Standards
Sun-Tec Rockwell Hardness Standards are made to the highest standards of accuracy and consistency, to provide a reliable method of verifying your hardness tester.
Manufactured in the U.S.A. and calibrated in the Sun-Tec standardization laboratory to NIST or ASTM Standards, Sun-Tec Hardness Standards help maintain and assure the accuracy of your Hardness Tester.
Includes Certificate of Calibration
Note: Specify hardness range and scale required when ordering – i.e.: 65 HRC