... grinding corundum sharpen abrasive wheel ceramic,rubber,resin wheel double side silicon oxide cylindrical grinding wheel,two side ... ,sanding disc,vitrified / rubber / resin bond wheels with double side grinding.Details: two sides grinding aluminium oxide & silicon ... have a good cutting techologyBrown aluminum oxideAGreyGreat toughness,high hardness,flesural strength.It can withstand a lot of pressure, ...