The aerofoil-shaped fan blades of the cooling tower are made of aluminum alloy by hot extrusion, with a hollow wing-shaped cross-section, featuring light weight, high airflow, low noise, excellent balance, and long-lasting without corrosion or deformation. Compared to fans of the same model made from other materials, the airflow is 20% higher at the same rotational speed. Available fan diameters range from 1200MM to 8000MM. There are two blade widths to choose from: 260mm and 350mm; and three blade quantities: 3 blades, 4 blades, and 6 blades. The center hole diameter can be customized according to the motor or reducer configuration. High-strength hollow aluminum wings are used, with the main shaft made of ￠36-50 40cr alloy material with a hardness of 30°, with a total length ≥ 1/2L, ensuring it doesn't crack under high pressure and high-speed conditions. Multiple U-shaped clamps with diameters of 14-16mm are used for fixation, allowing the blades to be adjusted in angle and securely fastened according to the selected airflow. The variety is diverse and the combinations are flexible: airflow ranges from 20,000m³/h to 900,000m³/h, with main shaft holes ranging from ￠28 to ￠80. Suitable for any type of cooling tower, widely used in square crossflow cooling towers, square (circular) counterflow cooling towers, and evaporative condensers, etc.