Fractal Design Silent R2 140mm Casing Fan
These fans have been specifically developed to deliver significant airflow while maintaining low noise levels. Silent Series R2 fans are available in sizes from 40mm up to 140mm. All new Silent Series R2 fans are equipped with high performance hydraulic bearings, increasing both fan performance and reliability. The 120mm and 140mm fans come with a low-speed adapter, which lets you choose between two different rotation speeds without a separate fan controller.