high strength,strong corrosion resistance large air volume,low noise six pieces stainless steel blades high-strength belt Features:1.Fan frame:Made of high-quality extra-thick galvanized sheet,high strength,strong corrosion resistance.2.Blades:Six pieces stainless steel blades attractive and durable.3.Belt pulley:High-strength aluminum-magnesium alloy thermoforming, light weight,high strength.4. ...