3 Step Wet Polishing Pads     These 3 step polishing pads are excellent choice for wet polishing. Suitable for any stones. Time-saving, labor-saving, money-saving.With velcro back. And velcro color can be changed as requested.Very flexible.One set including Pos.1,Pos.2,Pos.3 Available sizes: 4"Thickness: 3.0mmWet use.RPM: 4000Item No.SizeGrit No.Velcro ColorThicknessC2001563"/80mmPos.1Purple3.0mmC200157Pos.2  Dark BlueC200158Pos.3  Yellow