Aluminium A/A Oil Stone 1,beautiful shapes 2,good balance 3,high grinding ... 80# 120# 180# 240# 320# 400# 500# silicon carbide sharpening stone, oil stonesilicon carbide, china clay, feldspar and dextrin Ingredients: Uses: sharpen ... cutting tools Production process: Mixture forming dry firing corundum sharpening stone ,oil stonecorundum, china clay, feldspar and dextrin Ingredients: Uses: sharpen ...