7pcs Nylon Backed Diamond Resin Bond Dry and Flexible Polishing Pads Diameter: 100mm/4", Thickness: 3mm, Workable Thickness: 1.5mm, Available Gravel: #50 Waterless dry polishing, convenient and less polluting Flexible, suitable for different forms of polishing Application Dry polishing of granite , marble, tile, stone, quartz and all similar materials. Used on polishing equipment, such as polishers, angle grinders (high speed does not is not recommended), hand sanders, etc. Notice The maximum speed of the polishing pads is 4000 rpm, and the recommended speed is 2500 rpm. min. Must be used with polishing equipment. DO NOT USE THEM with a high speed grinder or other shaping equipment. Wear protective eye, nose, face, hand and other body parts while dry polishing. Feature Dry polishing, waterless working, convenient and less polluting. Easy pad identification with color-coded nylon knob High-gloss finish for polishing granite, quartz and marble edges. Flexible, suitable for polishing different shapes Pads are reinforced with nylon materials for quick disc change. Best value for money, very competitive Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.