... sizes 12-220 240-1200 #12-1200 1..Chemical and physical Usage:JIS#10-JIS#240(1)It can ... make the abrasive tool to grind the great hardness material, such as the high ... speed steel, stainless steel and high carbon steel.(2)It also usually used for sandblasting, such as precious metal, ... products.0-1,1-3,3-5,5-8mm and 180,200,240,280,320F Super Single Crystal Aluminium Oxide