... never mark the stone surface 4.for portable grinding M/C Features:1.Flexible polishing pads, also integrated grains with resin ... natural color5.White buff is used for polishing light color stone finally, and black buff for dark color.Other sizes and types ... 4, 5, 6TypeDry Polishing Pad, Wet Polishing PadGrit50,100,200,400,800,1500,3000,buff Dry diamond polishing pad for maintaining, repairing and ...