... grill,heavy duty,protect fan DJF-D Series Hanging exhaust fan(cowhouse exhaust fan)/ventilation fan/poultry equipment1 ... . new design fan house, light weight, elegant appearance, easy to install3. Round protection grill, heavy duty, protect fan ... blades, safety and steady4. inset design`s handle ,easy for carry, transport and installationModel specificationsDiameter biades mmBlades rotational ...