KEY FEATURES Double Ball Bearing. Aluminium Alloy Single Piece Blade. Increases Load Bearing Capacity & Durability. Sturdy in Construction, Heavy Duty Motor with Two Pre Lubricated Ball Bearings. Precision-Built Oscillating Mechanism with Indexing Option, 90 deg Oscillation. A Special Metallic Powder Coated Paint Finish That Protects the Fan from Corrosion."