Cooler Master Turbine Master Mach 1.2 120mm 1200 RPM Barometric Ball Bearing Case Fan (R4-TMBB-12FK-R0) The innovative Barometric Ball Bearing technology provides longer life span while remaining lower noise level. Removable blades for quick and easy cleanup. Outstanding 16-blade design covers maximum area to generate striking airflow, even under low speed operation. High airflow design gives excellent chassis ventilation. One-of-a-kind turbine shape inspired by a powerful turbine engine.