... 1.factory 2.delievry on time aluminum oxide Fiber discGrain: Aluminum Oxide for polishing Welding, Seams, Removing Rust ... life with Backing Thickness: 0.8mmMaterial availalble: Aluminium Oxide, Silicon Carbide, Zirconiawith Long working life. Perfect polishing ... automobile. SizeGritMATERIALThickness of FiberUsage100 x 16mm(4)P16-P400Aluminum Oxide, Silicon Carbide, Zirconia Aluminium0.8mm or 0.6mmWood, ...