BE QUIET! BL099 Computer cooling systems

be quiet! SILENT WINGS PRO 4 | 140mm PWM. Type: Fan, Fan diameter: 14 cm, Rotation speed (max): 2400 RPM, Airflow: 165,5 m³/hour, Maximum air pressure: 3,64 mmH2O, Bearing type: Fluid dynamic bearing (FDB). Voltage: 7 - 13.2 V. Width: 140 mm, Depth: 140 mm, Height: 25 mm. Product color: Black