The PH-F140SP, 140mm Premium fans from Phanteks is designed while using the unique Maelström concept technology. The fans are specifically designed to overcome high static pressure, blade deflection, and noise challenges. PH-F140SP also features 140mm mounting hole and is a great case/radiator fan upgrade option for users who want better airflow for their cases and radiators. PH-F140SP’s nine blades with MVB feature produce powerful yet silent downdraft airflow. With the UFB bearing, composed by MOSS and SSC systems, long lifespan and rotation stability are made possible. Packaged and priced reasonably, PH-F140SP is the right choice for case and radiator fan upgrade. PH-F140SP is setting the new standard in performance and compatibility. MVB (Maelström Vortex Booster) The new nine high pressure MVB blades are precisely angled to generate a silent controlled airflow. The blades produces a downdraft vortex allowing for greater amount of air passage through and reduce airflow turbulence across the surface of the blades to create significantly better performance and airflow while keeping noise to a minimum.