⊙Reasonable cone designing, low noise,big air flow, strong ventilation, low operating cost.

⊙Imported bearing, high-strength, lownoise, durable.

⊙Using air downstream principle, pvcshutter or aluminum shutter, antioxidant, light weight, no distortion, open andclose flexible, prevent backflow of air.

⊙High-strength more high-gluten strengthaluminum-magnesium alloy wheel, light weight, high strength, toughness good. 6pcs stainless steel blades, no distortion, no breaking, aesthetic durability.