Surface Mount Solar Power Attic Ventilator, For Attics Up To 1600 Sq Ft, High Profile, 20 Watt, Waterproof Panels, Hurricane Rate:140 MPH, 12" Aluminum Blade, Quiet Operation, Heavy Gauge, Stainless Steel Bird Screen With 1/8" Openings, Dims: 7-1/2";H X 22"W X 25"D, Weight:18Lbs, Origin:USA