Silicon Carbide Fiber Discs Thickness: 0.8MM Grit: P16-P400 Size: 100mm,115mm,125mm,150mm,180mm,230mm Fiber backing Grain Backing Diameter ... Made by Brown Aluminum Oxide, or Silicon Carbide, or Zirconia.This fibre disc have high surface removal rate, long service life ... should be kept in the package before operation.Application: Abrasive fiber discs for grinding welding, seams, removing rust, removing ...