Typhoon Copper/Resin Concrete floor polishing padsThese pads are designed for grinding and polishing concrete floor surface. They are very popular and the best resin concrete floor polishing pads on the market. Adopting resin bond and copper hybrid bond combination technology, improve the grinding efficiency. The life is increase almost 40% longer. Most durable.With velcro back. And velcro color can be changed as requested.More longer lifeUse with all concrete grinders or polishersOne set including 30 ,50 , 100, 200, 400grit.Available sizes: 3",4"Thickness:10mmBoth Dry and Wet Use.Item No.SizeGrit No.Velcro ColorThicknessC300001 3"/76mm 30Purple 10mmC300002 50Dark BlueC300003 100YellowC300004 200OrangeC300005 400Red