Porcelain media is used for surface polishing of aluminum alloy, zinc alloy, copper, resin (plastic) and other soft materials. It is finely ground before electroplating. It is often used in furniture hardware (such as handles, locks, etc.) and luggage hardware. (such as belt buckle, luggage buckle, shoe buckle, etc.), mainly round, triangular, oblique triangle, cylindrical, oblique cylindrical, the user can choose the size of the polishing stone according to the shape and size of the product.