Axial Flow FanStandard Lead Time is 1 3 weeks depending on quantity and production schedule. The airfoil propellers for the Tubeaxial Fans are designed and engineered for absolute maximum air delivery. They are cast of heavy duty, shatter resistant aluminum alloy. Each propeller is statically and dynamically balanced and secure to the motor shaft with a unique self locking featureall models, They are constructed of heavy gauge galvanized steelarc welded. A heavy