Hello, Looking to sell my Jnat Hideriyama as its a bit too hard for my taste. Its a finer and harder stone then the usual Hideriyama's, the hardness ranges somewhere from Medium to Hard and the grit is around 8000-10000. It provides a very fine edge with a nice amount of bite, I got the best results using a stainless steel knife on it. The size is, 210mm(Length) x 78mm(Width) x 20-25mm(Height). The thickeness varies depending on where you measure but 20mm is the thinnest spot where 25mm is the thickest. Keep in mind the bottom of the stone isnt uniform so It might vary a little. Stone is already sealed. Pictures included are taken with my Tanaka Ginsan knife, it does have low spots which I haven't not removed so dont think they are apart of the finish it gives The price is $175 USD without postage and the buyer can PM me for a shipping price to their country. International buyers welcome. Here's a fun little gif of me using the edge!