Aluminium oxide fiber discs Thickness: 0.8MM Grit: P16-P400 Size: 100mm,115mm,125mm,150mm,180mm,230mm Fiber backing Grain Backing Diameter X ... and should be kept in the package before operation.Application: Abrasive fiber discs for grinding welding, seams, removing rust, removing paint and polishing ... ship manufacturing, automobile, bridge and architectural industries. Aluminium Oxide Fiber Discs