Specifications: Material: polyurethane coated, nylon cordColor: purple or black (You can choose)Quantity: 5 pcsGranularity: 60#Maximum Rotational Speed: 10000 RpmOuter Diameter: 100 mm/3.94 inchInner Diameter: 16 mm/0.63 inchThickness: 12 mm/0.47 inchWeight: Approx. 369 g Package List: 5 x Poly Strip Wheel Note: Due to the difference between the monitors and light effect, the picture may not reflect the actual color of the item.Please allow small error due to manual measurement. Thanks for your understanding. Durable for use Great performance in grinding and polishing effect. Wear resistance, uniform grinding effect. Wide Range of Use Widely use Widely used for grinding and polishing the surface of steel, aluminum, copper, plastic, fiber products, wood, stone, concrete, etc.