Derales largest H.O. Extreme electric fan, this powerful 16 inch diameter unit uses 10 thin, curved blades to provide a low profile (only 3 7/16 inch at widest point) for limited space applications. Using a sealed waterproof/dustproof motor that lasts up to 3 times longer than normal electric fan motors, this puller fan is designed to provide maximum performance at high static pressure loads. Mounting kit and installation instructions included.