... green silicon carbide oil stone, black silicon carbide oil stone, brown corundum oil stone and white corundum oil stone are our ... 400# 500# 1000# 4000# 6000#Alundum carbide sharpening stone, oil stoneIngredients: alundum, carbide silicon, china clay, feldspar and dextrin Shapes ... tools are produced in our factory. More Grindering stone/ oil stone / sharpening stone, please view our relative catagory ...