Specifications Colour: Black Filter Material: Aluminium, Galvanised Sheet Fan Material: ABS Duct Material: Aluminium Foil Connection Ring Material: 201 Semi Steel Voltage: 120V Frequency: 60Hz Power: 70W Current: 0.85A Speed: 2400RPM Airflow: 395CFM Static Pressure: 355 Pa Noise: 34dB Filter Aperture: 15cm/6inch Filter Height: 44cm/17.36inch Filter Diameter: 22cm/8.85inch.