140mm APACHE BlackS-FLOW fan blade design delivers 30% higher airflow.Super silent 14cm fan with S-FLOW blades supplying 30% more airflow than a standard fan at the same speed. The greater performance combined with PWM automatic speed control allows the fan noise to be kept to a minimum.The Apache fan creates more focused airflow providing blind-spot cooling, which makes it an ideal solution for a case or heatsink fan. HDB (Hydro Dynamic) bearings extend fan life and further enhance noise reduction.It’s powerful and quiet!Key Features- Super silent APACHE BLACK 14cm fan- S-FLOW fan blade design delivers 30% higher airflow- Super silent with PWM speed control- Hydro Dynamic Bearing extends fan lifeApplicationPC case or heatsink fanDimension140 x 140 x 25mmFan Speed600-1300 RPMMax Airflow89.55 CFMMax Static Air Pressure2.76 mm H2ONoise Level12.5 -22.19 dB(A)Voltage Rating12V DCBearingHDB (Hydro Dynamic Bearing)Fan Life Expectancy50,000 hoursConnector4-pin PWM