Features: brand new and high quality High static pressure fan designed to provide the best performance on radiators and heat sinks. Smooth fan blades are aerodynamically optimized for quiet operation. Wide RPM range up to 2200 rpm for highest performance when needed. Premium and solid construction with PBT material and UFB (Updraft Floating Balance) bearing. The hydraulic bearing design,it has a large oil storage space and an oil seal cover, which can reduce lubricating oil over flow, while reducing friction and noise. Specifications: Material: ABS Colour: Black+white Product size: approx. 120x120x25mm/4.72x4.72x0.98in 140x140x25cm/5.51x5.51x0.98in(optional) Rated voltage: 12V for DC Connector: 4pin (pwm) Bearing type: hydraulic bearing Speed: 500-2200rpm (optional) Air volume: 60.51CFM Noise: 18~34.2db (a) 10% Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 X CPU cooler