4" Wet Diamond Polishing Pad, Grit #3000 x 2 Pads Free 1-3 days expedited shipping by USPS Grit #3000 for very fine polishing Hard white resin and high diamond content for long life and fast cutting and won't stain your surface High quality diamond polishing pads for wet polishing of granite and concrete Tested 5000 rpm, use higher speed at your own risk!