The PH-F140SP, 140mm Premium fans from Phanteks is designed while using the unique Maelstrom 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. PH-F140SP is the right choice for case and radiator fan upgrade. PH-F140SP is setting the new standard in performance and compatibility.