The 6 INCH INLINE DUCT FAN EXHAUST BOOSTER BLOWER with a CFM of 240 is an electric-powered fan made of steel, designed for indoor use. With a silver color and a diameter of 6 inches, this fan operates quietly and features 5 blades for efficient ventilation. Manufactured by Aero~flo in the United States, this model (AF-6) is suitable for boosting air cooling and heating systems, making it a reliable choice for maintaining optimal indoor air quality. Its compact design and single speed setting make it easy to install and use in various ventilation setups.