Product Overview Teaming up eleven stator guide vanes with a specially conceived seven blade impeller the NF-F12's Focused Flow™ system creates outstanding static pressure and focuses the airflow for superior performance on heatsinks and radiators.At the same time a wide range of advanced aerodynamic design measures second generation SSO-Bearings and Noctua's new custom designed PWM IC for fully automatic control guarantee astounding quietness of operation. The NF-F12 comes with modular cabling integrated anti-vibration pads and two speed settings for full flexibility. Its commanding performance exhaustive set of features and Noctua's trusted premium quality make it an elite choice for use on air coolers radiators and other pressure demanding applications..