I. corrosion resistant,light weight.II. large wind output, ... service life TsingTao JinHaoShunFeng Industry And Trade Co.,LtdDETAILED INFO:I.Blade, made of the cold steel plate, molded, with ... volume, no distortion. II.Fan house adopts new design, light weight, elegant appearance, easy to install. III.Round protection grill, ... . SERVE U BEST!!! Professional Hanging Air Circulating Fan for Poultry House