Wilson Rockwell HRK Rockwell K Hardness Calibration Blocks, Pair of Two NEW

Wilson Buehler 50.10 +/- 1.5 HRBW Rockwell B Hardness Calibration Block

Wilson Rockwell HRG Rockwell G Hardness Calibration Blocks, NEW

Wilson Buehler 44.52 +/- 1.0 HRBW Rockwell C Hardness Calibration Block

Rockwell Hardness Test Blocks Penetrators Accessories

Wilson Buehler 70.72 +/- 1.0 HRBW Rockwell B Hardness Calibration Block

Wilson Buehler 59.98 +/- 1.5 HRBW Rockwell B Hardness Calibration Block

Wilson Buehler 67.27 +/- 1.0 HRBW Rockwell B Hardness Calibration Block