Lighthouse Hydro 100 CFM Duct Booster Inline Cool Air Blower Vent, 4-Inch Flange Size: 4", Dimensions: 4"(L) x 4"(W) x 7"(H), Weight: 1.5 lbs., Compatible with 4" Carbon Filter Voltage: 110V/60Hz, Power: 43.8 Watts, Current: 120 Volts, 100 CFM (Cubic Feet per Minute) Vibration free operation, All metal construction, Heavy duty metal impeller Low power draw, Grounded 42" power cord, Balanced motor with permanently lubricated bearings Extremely effective for short run Duct work