The Suehiro Gokumyo 20k synthetic waterstone known as the Gok 20…..

The 20G features a hard ceramic binder and a particle size of .5µm.

210nm x 70mm x 25mm

The Gok 20k comes with its own custom fitted rubber stand/holder, and a very fancy 400x rubbing/dressing stone with a handle.

Barely used … packaging like new…..