Zalman Utra Quiet ZM-F2 Plus (SF) 92mm Long Life Bearing, Black Dimension: 92(L) x 92(W) x 25(H)mm / Weight: 79g / Fan Speed: 1,500 rpm / Noise Level: 20-23dBA / Voltage: 12V / Life Span; 50,000 hr. / Long Life Bearing Silicone pin absorbs the vibration between the fan and the case allowing a quiet work environment. Minimized noise and vibration through lowest rpm. Suitable for silent system environment. Optimized for maximum airflow, Shark`s Fin blade greatly reduces the turbulence caused by fan rotation, thus decreasing the noise and vibration while increasing the airflow. Long Life Bearing applied, minimizing noise and inflow of the dust For longer life cycle.