... : 100mm,115mm,125mm,150mm,180mm,230mm Velcro backing Silicon Carbide Velcro Disc Grain Backing Diameter X Hole sizeGrit No ... used for precision polish of inner hole and flex tube-- Ideal for polishing and grinding the automobile surface coating ... weight paper, craft or latex paper, Norton paperMaterials: aluminum oxide, silicon carbide, zirconium oxide, zinc-stearateColor: white, brown, yellow, black, ...