Air outlet is a static eliminate device that using compress air to eliminate static and dust, especially fitting for occasion where can not be reached by hand or sheltered locations. The functions commonly consider adjusting airflow diffusing area, regulating the size of the wind or leaching air and so on, according to different requests or different functions, there are some common air outlets, such as aluminium alloy air outlet, retain air outlet, air diffuser, swirl air outlet, cambered outlet, aluminium alloy shutter, ceiling overhaul outlet and so on. Air diffuser generally suits for installing in side walls, floors and ceilings.