Specification :

dopt the system which can open and close automatically when the fan woks .
11. Centrifugal shutter system and other fitting of shutter made of Nylon ,high quality engineeeing plastics ,100% raw materials ,high strength ,and long service life .,.
12. The inner steel fitting install in the flange ,increasing the security avoid the stretching change when Nylon system operates.
13. Adopt the injection molded stainless steel blade , no broken ,no distortion ,aesthetic and durable .
14. Balance running machinery checked in the entire fan blade ‘s balance ,ensure operating steady ,low noise , long service life .