Product Detail Performance cooling with a low-noise profile Twister Bearing technology for longer lifetime and low noise Batwing Blades design and Carved Halo Frame for extra 20~30% airflow Patented Modular Frame with aluminum ring for enhanced stability of structure Detachable fan blades for easy cleaning . The "T.B. SILENCE 120MM TWISTER FAN CFAN" is best product for you. We recommended T.B. SILENCE 120MM TWISTER FAN CFAN