Review on 📐 Mitutoyo Steel Rectangular Block Length Calibration Test & Measurement Tool by Robert Pearson

I bought a 30mm x 9mm x 3mm block expecting to be able to test the accuracy of my Mitutoyo calipers (500-196-30). The 3mm side was in place. exactly 3.00 mm. But the 30th and 9th pages of this block were turned off. 29.94 and 8.88. Apparently only the 3mm side is checked and the block actually has the number "3" stamped on it. So I'm not sure if the other sides of the block should be exactly 30:00 and 9:00 or if my calipers are off.