Rosewill Computer Case Fan, 140 mm, Seal IP56 Dust Resistant and Splash Proof, PWM Speed Control, Teflon Nano Bearing with Noise Cancelation.

140mm Case Fan 1200 RPM / 900 RPM 82 CFM / 60.23 CFM 21.5 dBA / 14.5 dBA NCA (Noise Cancelation Adapter) Teflon Nano Bearing Dust Resistant Splash Proof Case Fan