... Size: 100mm,115mm,125mm,150mm,178mm, Material: Aluminum oxide Flexible grinding disc,radial flap disc Diameter X Hole sizeGrit No ... iron, mid steel, welding rods, cost iron aluminium, non-ferrous metals and wood.2)Silicon carbide (disc in black color ), ( ... on metals. High performance.These discs do not contain metal iron and/or iron compounds.Exhibition booth:Production line: Flexible grinding ...