Noctua NF-A8 PWM CH.BK.S. Type: Fan, Fan diameter: 8 cm, Number of speed settings: 2, Rotational speed (min): 450 RPM, Rotational speed (max): 2200 RPM, Airflow: 55.5 m³/h, Maximum air pressure: 2.37 mmH2O, Bearing type: Self-Stabilising Oil-pressure Bearing (SSO). Width: 80 mm, Depth: 80 mm, Height: 25 mm. Product colour: Black