wrought iron, aluminum alloy. This material has high strength and durability, and can bear the weight of the door head and maintain the stability of the structure. In the production process, metal materials can be cut, punched, welded and other processes to produce beautiful hollow lattice design. This design can increase the decorative effect of the door head, and also provide ventilation and light transmission functions. Metal materials can also be surface treated as required, such as spraying, electroplating, etc., to increase corrosion resistance and decorative effect.