7/10/12/14 Inch Wall Mounted Shutter Exhaust Fan Speed Controller Attic Vent Fan

A luminum Automatic Shutters Design:Automatic shutter design, the blades automatically open when working, closed when stopping, 100% fully enclosed, no deformation, rust, weatherproof, prevent foreign bodies (dust, rain, mosquitoes) from entering, reduce heat loss and improve energy efficiency Specification:.

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