【material】Made of wool felt. Color: White + Black. Widely used for polishing and cleaning various surfaces, such as polishing metal, glass and ceramic, as well as polishing marble, car and wooden floors. 【diameter details】 The hole diameter is 16mm/0.63" (for electric grinders and pneumatic grinders), the wheel shoe has an outer diameter of 100mm x 13mm thickness/3.9" x 0.51". Maximum speed: 11000 (rpm). Grit: 2000 grit. 【Wide applications】Widely used for fine polishing of stainless steel, copper, aluminum, glass, ceramics, wood, marble and other parts. When working, use a polishing paste suitable for the workpiece, then the polishing effect will be greater. 【The package includes】15 polishing disc pads with the same specifications. 4-inch round felt polishing pads for all your polishing needs. 【Warm review】Please confirm the size before purchasing. The diameter of the installation hole should be consistent with the diameter of the wool wheel hole. When working, you must wear