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HF-010 Fresh Air Louver 1)Material:Aluminum alloy 2)Fresh Air Louver is for sidewall,The core is fixed,which is 30 degrees. 3)White powder-coating finish or no painting for choice,or color you are prefer. 4)Filter(Nylon or aluminium alloy)is optional. 5)Easy installation and maintenance 6)OEM is Available Outer standard Size: As per your request(Face size=Neck size+54mm) Height: 50mm Neck size: A*B(size is as per your request) Order Notes: Item-neck size A?-color/(filter or not)

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