Rosewill 140mm Computer Case Cooling Fan with LP4 Adapter RNBD-131409 Fan Size: 140mm Bearing Type: Long life sleeve Noise Level: 22 dBA Air Flow: 55.4CFM 2 Pack This 140mm case keeps the noise level down to 22dBA for silent operation Fan Size: 140mm Bearing Type: Long Life Sleeve RPM: 1200RPM +/- 10%RPM Air Flow: 55.4 CFM Noise Level: 22 dBA