be quiet! Dark Rock 6. Type: Air cooler, Fan diameter: 13.5 cm, Rotational speed (max): 2000 RPM, Airflow: 89.95 m³/h, Maximum air pressure: 2.48 mmH2O, Bearing type: Fluid Dynamic Bearing (FDB). Width: 139 mm, Depth: 102.4 mm, Height: 162 mm. Product colour: Black