Product Overview Teaming up eleven stator guide vanes with a specially conceived seven blade impeller the NF-F12s Focused Flow™ system creates outstanding static pressure & focuses the airflow for superior performance on heatsinks & radiators. At the same time a wide range of advanced aerodynamic design measures second generation SSO-Bearings & Noctuas 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 & two speed settings for full flexibility. Its commanding performance exhaustive set of features & Noctuas trusted premium quality make it an elite choice for use on air coolers radiators & other pressure demanding applications..