Naniwa NK-2091 Professional Whetstone Kagayaki #12000 Sharpener with Storage 

• Size: 210×70×10mm
• Material Corundum
• Color Gray
• Product Dimensions 9.41"L x 3.27"W x 1.3"H
• Grit Type Ultra Fine
• Number of Items 1
• Whetstone size: Length 8.3 x Width 2.8 x Thickness 0.4 inches (210 x 70 x
• Applications: Super fine sharpening, long cutting of cutlery, and the best super finish to give out the shine