SPL 1000 STDF 8-Inch 420 CFM Air Duct Inline Hydroponic Booster Fan 8-Inch diameter, 420 cfm, 110/120-volt Superior metal blades for long life and quiet operation; light weight and install anywhere Solve air delivery problems without major system rework or expense Extra-long 5.5-Feet grounded power cord Motor features a permanently lubricated bearing that operates quietly and requires zero maintenance