... , competitive price. 3. By electric. Dry Angle stone polisher is for diamond polishing pad, cup wheel dry polishing and dry grinding. 1. Speed can be ... -4000RPM3", 4", 5"50HZM10, M12, M14, 5/8-11For flexible polishing pad polishingdry polisher540W220V11000RPM3", 4", 5"50-60HzM10, M12, M14, 5 ...