... Usage:JIS#10-JIS#240(1)It can make the abrasive tool to grind the great hardness material, such as the ... steel and high carbon steel.(2)It also usually used for sandblasting, such as precious metal, the gold, crystal, the glass ... -8mm and 180,200,240,280,320F Bacmac Aluminium Micropowder Brown Fused Alumina