Stadea Series Standard J, 4" Wet Diamond Polishing Pads Designed to Polish Concrete Surfaces, Concrete floor, Concrete Countertop, Terrazzo Floors, Quartz Stone Granite counter Edges. Outstanding finish on Travertine Floor, Marble Floor & Countertop, Countertop Edge polishing, glass polishing Grit 30 polishing pad 1 piece, also available in Grit 50, 100, 150, 200, 400, 500, 800, 1500, 3000, 6000, 8000. Grit 30, 50, 100, 200 pads can be used either wet or dry Outstanding finish and shine on Concrete Countertop, Concrete Floor. Exellent finish on Terrazzo Floor, Travertine Floor, Marble Floor Polishing, Granite Edge, Quartz Edge, Stone Edge Polishing Aggressive, flexible and durable made with quality resin impregnated diamond powder Optimal RPM 2200, Max RPM 4500 Stadea Series Standard J, Diamond polishing pads for concrete polishing Grit 30.