widely used on polishingthe surface of the hard materials ,such as marble,granite Material: Diamond Impregnated Resin diamond polishing padswidely used on polishingthe surface of the hard materials ,such as marble,granite and so onMaterial: Diamond Impregnated ResinSize:4-9"Grits: 50, 100, 200, 400, 800, 1500, 3000Excellent quality,suit for marble,granite,man-made stone,natural stone arc,line, ...