YUSHI 4 Step 0.100'' 0.200'' 0.400'' 0.600'' 1018 Steel Test Calibration Block for Thickness and Linearity Calibration in NDT

affordable and accurate as far as i can tell.checked with a calibrated caliper and all values are less than a thou of errorfor another few bucks I would have loves a small case to keep it in...

Purchased for use as a UT calibration block. Very basic, arrived heavily oiled in a plastic bag with a certificate of conformance. I have not done a hand measurement, but will. I expect it to be accurate, as it matched fairly closely to other UT blocks here. No case or storage.