Kyoto Otani Toishi Seisakusho Finishing Stone Kitayama Dimensions: Length 205mm, Width 75mm, Thickness 25mm Manufacturing Method: Resinite Method (Resin Molding) Grain Size: Final Finishing Stone (8000#) Due to the blending of natural stone powder, it has a sharpening feel and finish close to natural stones. Because of the Resinite method, please refrain from soaking the whetstone in water for a long time. There is a possibility of softening or cracking due to the deterioration of the bond. Application: Finishing of blades Available for immediate purchase.