Bar.b.q.s 10000 Grit Sharpening Stone Water Stone Dual Whetstone 1.Dimension: 7.09" x 2.36"x 0.59" (180mm x 60mm x 15mm) 2.Particle size : 10000# 3.Soak the stone in the water for 5 minutes and then put it on a steady surface such as a table or d 4.Do not rinse away all the slurry on the stone surface since it's helpful to make the knives sharpe 5.Material: white corundum