Rosewill RFBF-131411 - 140mm Computer Case Cooling Fan with LP4 Adapter - Fluid Dynamic Bearing, Super Quiet (Pack of 2) Type: Case Fan Bearing Type: Fluid Dynamic RPM: 1200RPM ± 200 RPM Air Flow: 48.7 CFM Noise Level: 23 dBA Color: Black 2 pack Compatibility: Case