Flap Disc/poly Strip Disc For Angle Grinder 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,stone and wood. Packing:white box/plastic bag