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BUTTERFLY FAN FRAME 1. Use advanced production technology with automatic equipment.Professional production line. 2. Hot Galvanized sheet with zinc thickness of 275g/㎡, avoiding rust effectively.CONE PART & DOUBLE DOOR 1.Reasonable Cone design for bigger exhaust power, Large airflow and steady air output. 2.Using advanced front double door opening device, small wind resistance, good sealing, high efficiency;MOTOR 1. Brand: Chinese Famous motor, Siemens. 2. Motor Protection Grade: IP55 3. Isulation Class: F grade Advantage: Motor Voltage and Frequency can be Customized. 100% Cupper WireBLADE SUPPORT BASE 1.Material: Aluminum Magnesium Alloy. 2. Type: Plug-In Connection Advantage: Compare With The Traditional Welding Connection , Our New Type Aluminum Magnesium Alloy Base Has Greatly Reduced the Friction Coefficient, Fixed More Firmly,FAN BLADES Material : Stainless Steel, Advantage: Large Air Flow, No Deformation, No fracture, No Dust, Attractive and Durable. Note: Blade Material Also Have Galvanized Sheet, Aluminum Alloy for Chooice.DYNAMIC-BALANCE TESTER Fan Blades Are Adjusted by Dynamic-Balance Tester, the Weight Tolerance of Each Blade is Controlled Within 1 g. Advantage: Ensure the Fan Smooth Running, Lower Vibration, Less Noise, Increase Stability.BELT Brand: Mitsuboshi Belt (Japanese) Advantage: Famous Brand; Long Service life;Maintenance Free.BEARING Imported Double-Row Bearing With Special Waterproof Design. Advantage: High Strength, Low Noise, Free Maintenance and Long Service Life.SAFE NET Material: Hot-Dip Galvanized Wire is Coated With Plastic Advantage: Double Protection to Ensure Never Rust.