The ph f140sp 140mm premium fans from phanteks is designed while using the unique maelstrm concept technology the fans are specifically designed to overcome high static pressure blade deflection and noise challenges the new redeveloped blades in ph f140sp are angled lower to achieve higher air pressure the redesigned mvb blades generate better airflow and produces better performance it improves the balance of airflow and air pressure when using with as a case fan the ph f140sp has a lar