By coating diamond grinding grains on non-woven fabric, you can get a finished surface like free grinding grain, and polish non-abrasive surfaces without staining the surface of the non-abrasive material like paste or slury; Grit Size (#): 4000; Length x Width: 3.9 x 3.9 inches (100 x 100 x 100 mm); Non-woven fabric; Abrasive material: artificial diamonds; *This product cannot be cancelled after payment. This product is the manufacturer and customers This is a direct product from the manufacturer. COD Payment, Designate Delivery Time, and Store Counter PIckup are not available. Thank you for your understanding.