Vents, Stainless Steel Exhaust Cap, 304 Wall Vent Hood, Thickness Air Vent, for Ventilation(11.8inch(300mm))

Product Material The roof wind fume evacuator is made of high quality 304 stainless steel, one piece molding without deformation, smooth surface without sharp corners, curved wind shovel with less wind resistance and smoother rotation. Ventilation connection size: 4.3 inches (110 mm), 6.3 inches (160 mm), 7.9 inches (200 mm), 9.8 inches (250 mm), 11.8 inches (300 mm), 15.7 inches (400 mm) SIMPLE INSTALLATION - All hoods are shipped complete, no need to assemble, come with installation accessories, easy to install, just take them out and fix them. Working principle: Use natural wind and thermal convection of air caused by the difference between indoor and outdoor temperatures to push the turbine to rotate, thereby using centrifugal force and negative pressure effect to discharge indoor air which is not cool. The latest ceiling fan on the market, easy to install and stylish to the eye