7pcs Diamond Resin Bond Nylon Back Flexible Dry Polishing Pads Diameter: 100mm/4", Thickness: 3mm, Workable Thickness: 1.5mm, Available Grit: #50 Dry polishing without water, convenient and less pollution Flexible, suitable for different polishing shapes Application Dry polishing of granite, marble, tile, stone, quartz and all similar materials. Used on polishing equipment, such as polishers, angle grinders (high speed is not recommended), hand sanders, etc. Notice The maximum RPM of the polishing pads is 4000 rpm, and the recommended RPM is 2500 rpm. They must be used with equipment polishing. DO NOT USE with a high-speed grinder or other shaping equipment. Wear eye, nose, face, hand, and other body protection during dry polishing. Feature Dry polishing, waterless work, convenient and less polluting. Easy pad identification with color-coded nylon knob. High-gloss finish for polishing edges of granite, quartz, and marble. Flexible, suitable for polishing different shapes. The pads are