... grinding disc,radial flap disc Grit: P40-P400 Size: 100mm,115mm,125mm,150mm,178mm, Material: Aluminum oxide Flexible grinding disc,radial flap disc Diameter ... 0"X22MM Applications by different abrasive: 1)Aluminium oxide, (A.O.)Suitable for iron, mid steel, welding rods, cost ... building materials, hand materials, glass.3)Zirconium Oxide, (Z.A.)4)T27/T29 is available.Suitable for heavy deburring and ...