The TOUGHFAN is a PWM controlled fan which performs at a maximum operating speed of up to 2000 RPM allowing unparalleled cooling performance. Its fan blade is built with special liquid crystal polymer (LCP), a compound which minimizes vibration when the fan is operating at full speed, and the center is constructed with a full steel motor hub providing enhanced stability and durability. The TOUGHFAN 14 is designed for all cooling applications. It s your perfect go to solution whether your using it as radiator fan or on a air cooler. Level up with the TOUGHFAN for superior cooling performance.