FDB BearingThe air volume larger while providing maximum cooling performance, and extending the life of the fan can reach more than 70,000 hours.
antec
Antec PWM PC Fans, 120mm Fan, 4 Pin PWM, 60.4CFM Case Fans, 12V 4 Pin PWM Connector, Computer Fans with 1400 RPM, P12 Series 5 Packs
Silent Case Fan : 8 rubber pads which can make your rig more quietly (34.49 dBA) when the fans work with high performance.