The #16000 stone is an exception in Shapton's Glass Stone line.
While the abrasive particles of the other stones are uniform, this is not the case for this 16000 stone.
This stone is composed of different types of abrasive particles that together polish even better.
Thanks to its special composition, this stone is even better able to polish the sharpening marks on the edge.
And polishing is precisely the specialty of this stone - there are few stones with such a fine grain size.
This stone is really intended for the last step to achieve an incredible edge.
You must first sharpen your knives very finely to get the most out of this 16000 stone.