Suncourt In-Line Duct Air Booster Fan In-line duct fan solves air delivery problems without major system rework or expense. Applications include boosting airflow to rooms that are too hot or too cold and general ventilation of clean indoor air. Designed to fit flexible and rigid ducts. Fan has 1 end with a crimp and bead design for easy installation. Sleeve bearings allow for installation at almost any angle. Features a tip-throw, balanced blade. Thermally protected Class B motor has large oil reservoir to ensure a quiet, long life. Made of corrosion-resistant metal. Not to be used in temperatures exceeding 140 deg degree . Includes attached power cord and installment screws. UL approved. 1 year limited warranty. Housing Material Corrosion Resistant Metal, Fan Blade Material LEXAN Polycarbonate, Flow Rate 65 cfm to 80 cfm, Width 4 , Height 4 , Depth 4 , UL Listed ETL C/US , Pkg Qty 1, Package Type Box