Xigmatek Cooling Fans Volcano XOF-F1254 2pack Red Turbo Fan, bullet-shaped fan hub for improving air flow Silent airflow design, 14dBA only A Fluid Circulative Bearing (FCB) extends performance Life Expectancy: 50000 hrs, RPM: 1400 +/- 200, Air Flow: 53.34 CFM, Air Pressure: 1.51 mmH20, Noise Level: 14 dBA, Power Connector: 3 Pin