... black silicon carbide oil stone, brown corundum oil stone and white corundum oil stone are our main products.Grit Size ... sharpening stone, oil stoneIngredients: corundum, carbide silicon, china clay, feldspar and dextrin Shapes: Rectangular, square, boat, bar; We can do ... firing OEM service is available, we do good performace and competitive price, many branded abbrasive tools are produced in ...