Noctua NF-P14r redux-1500 PWM Case Fan - Newegg.com
Antec 140mm Case Fan, 30mm Thickness Fans, 140mm x 30mm Case Fans, PWM PC Fans, 140mm
140mm RGB PC Fan 4-pin Molex | eBay
Amazon.com: 140mm Case Fan High Performance Standard Square PC Case Fan 4pin Connector 12V DC Computer CPU Case PWM Cooling Fan 1700RPM 3-Pack Black : Electronics
Amazon.com: 140mm Case Fan High Performance Standard Square PC Case Fan 4pin Connector 12V DC Computer CPU Case PWM Cooling Fan 1700RPM 3-Pack Black : Electronics