7pcs Diamond Resin Bonded Dry Flexible Polishing Pads with Nylon Backing Diameter: 100mm/4 inch, Thickness: 3mm, Workable Thickness: 1.5mm, Available Gravel: #50 Dry polishing without water, convenient and environmentally friendly Flexible, suitable for various polishing shapes Application Dry polishing of granite, marble, tile, stone, quartz and all similar materials. Used on polishing equipment such as polishing machines, angle grinders (high speed is not recommended), hand grinders, etc. Note The maximum speed of the polishing pads is 4000rpm, the recommended speed is 2500rpm. They should be used with polishing equipment. DO NOT USE THEM with a high speed grinder or other shaping equipment. Wear protection for eyes, nose, face, hands and other body parts when dry polishing. Feature Dry polishing, waterless working, convenient and less harmful to the environment. Easy to identify the pads thanks to the color-coded nylon button High gloss finish for polishing granite, quartz and