![Master Flow IR612BR Roof Louver, 17-1/2 in L, 18-1/2 in W, Resin, Brown, Roof Installation [SKU: ORG5906078]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/600x600/products/34389/33059/5906078__09013.1683068788.jpg?c=1 "Master Flow IR612BR Roof Louver, 17-1/2 in L, 18-1/2 in W, Resin, Brown, Roof Installation [SKU: ORG5906078]")
![Master Flow IR612BR Roof Louver, 17-1/2 in L, 18-1/2 in W, Resin, Brown, Roof Installation [SKU: ORG5906078]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/1280x1280/products/34389/33059/5906078__09013.1683068788.jpg?c=1 "Master Flow IR612BR Roof Louver, 17-1/2 in L, 18-1/2 in W, Resin, Brown, Roof Installation [SKU: ORG5906078]")
Product Overview
Just 2 in H for better appearance. Injection-molded, high-impact resin construction for long life. Colors complement most roofs. Pre-drilled nail holes make installation easier. 11-3/4 in x 9-3/4 in opening, 18-1/2 in x 17-1/2 in flashing, 4-1/4 in H, 37 sq-in of net-free ventilating area. [QTY/UOM: 1EA / 1EA] [PMS SKU: ] [Category: VENTILATION PRODUCTS/ROOF VENTILATORS;Shop All]
![Master Flow RT65BR Roof Louver, 18-1/2 in L, 18 in W, Resin, Brown [SKU: ORG6247688]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/500x659/products/34458/33128/6247688__00315.1683068828.jpg?c=1 "Master Flow RT65BR Roof Louver, 18-1/2 in L, 18 in W, Resin, Brown [SKU: ORG6247688]")
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![Master Flow SSB960ABR Roof Louver, 18 in L, 20-1/2 in W, Aluminum, Brown [SKU: ORG6247639]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/500x659/products/34462/33132/6247639__54031.1683068830.jpg?c=1 "Master Flow SSB960ABR Roof Louver, 18 in L, 20-1/2 in W, Aluminum, Brown [SKU: ORG6247639]")