Fractal Design Silent Series R3 40mm - 1.57in Maximum Fan Diameter - 26.9 gal/min Maximum Airflow - 4000 rpm - 20 dB(A) Noise - Rifle Bearing - 3-pin - Case

3-pin connector enables quick and stable connection with cases Well designed blades and shroud let the air flow over a greater area to enable effective cooling Features rifle bearing to improve longevity, silence, and stability