... Abrasive & Grinding Tools, green silicon carbide oil stone, black silicon carbide oil stone, brown corundum oil stone and white corundum oil stone are our main products ... # 500# 1000# 4000# 6000#Alundum carbide sharpening stone, oil stoneIngredients: alundum, carbide silicon, china clay, feldspar and dextrin Shapes: Rectangular, square, boat ...