Products name:Clean Disc and Strip Disc Material:Silicon Carbide,Reinforced fiberglass backing,nylon backing Grit:soft density(black),medium density(blue),high density(purple) Diameter:4inch,4.5 inch, 5 inch,etc. Application: Removing paint and adhesives,cleaning weld seams removing welding scale and discoloration,surface preparation. Work Surface:Stainless steel,standard or alloyed steel,aluminum,titanium,nonferrous materials,alloys,fiber glass,plastic reinforced by fibre glass,tone and wood. Packing:white box/plastic bag, customization available Remarks:Size and packing is customization available