New Leaf 6" 260 CFM Inline Duct Booster Vent Fan with Aluminum Blade Powerful and efficient performance - 260 CFM (cubic feet per minute) Higher efficiency than other 80cfm blowers. Can clear odor of 1,000 cubic feet (10ft x 10ft x 10ft) grow tent within 4 minutes! Dual crimped flanges on both sides to hook-up with duct easily. Galvanized steel sheet housing.