Combination Grit Waterstone, Overall Length 8 in, Overall Width 3 in, Overall Height 1 in, Abrasive Material Synthetic, Grade Extra Fine, Ultra Fine, Grit 4000/8000, Primary Material Application Stainless Steel, Aluminum, Brass, Bronze, Cast Iron, Copper, Tile, Titanium, Tool Steel, Compatible Lubrication Water, Color Brown, Gray