Quote Originally Posted by Winblows View Post
I'm looking at this one on eBay:


Anybody confident with this Naniwa Nagura 65 x 47 x 32mm ?
I wonder, what is the grit of it and on which stones (grit) can I use it on efficiently ?

the grit rating is ~600.
This is referred to as Nagura, but it is just a dressing stone. It is meant to clean the hone surface not for slurry generation, because it is very soft and releases particles in the slurry.