Tolerance calibration shape

It takes high calibration to print this shape correctly. If printed with zero infill, or if under extruding, the side that narrows to thin edge will have a very different length/width compared to the opposite side (circular hole side).

This shape was created to be used similar to the calibration cube. I find that I get more information from the XYZ lettering that is usually scripted on the sides so I figured a little more detail in a simple shape would be good. The size is 20 x 20 x 20mm, and