Thermaltake TOUGHFAN 14 Black PWM 500~2000rpm-controlled high Static Pressure 140mm Circular Radiator Fan with with Anti-Vibration Mounting System Cooling, (2 Fan Pack) CL-F085-PL14BL-A

Unparalleled Cooling Performance: The TOUGHFAN is a PWM controlled fan which is designed to perform at a maximum operating speed of up to 2000 RPM allowing unparalleled cooling performance. | Exceptional Blade Design: Featuring extreme tensile strength and low thermal expansion coefficient materials, the fan blade is built with special liquid crystal polymer (LCP), a compound which minimizes vibration when the fan is operating at full speed. | Metal-Reinforced Motor Hub: The TOUGHFANs center is constructed with a full steel motor hub providing enhanced stability and durability. | The 2nd Generation Hydraulic Bearing: The 2nd generation hydraulic bearing incorporates a new shaft design with inside etches allowing preservation of lubricant on both sides whilst reducing noise during operation.