2" Flap wheel complete with hub and universal flange for any size abor. 1/4" to 2" abor size. 28 segment brush/abrasive segments Grit 320. The finish grit we carry for fine sealer sanding on dark stained work pieces, where sanding around edges and delicate cut outs needs a very fine grit to be successful. Using a finer grit also make the job easier for the operator as attention to sanding pressure and sanding time on edges is not as critical because the grit is finer. If you are new to sanding with flap heads on sealer parts this would be  a good starter grit.