![Master Flow R50ABL Roof Louver, 17-1/2 in L, 17.4 in W, Aluminum, Black [SKU: ORG6581656]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/600x600/products/34387/33057/6581656__54587.1683068787.jpg?c=1 "Master Flow R50ABL Roof Louver, 17-1/2 in L, 17.4 in W, Aluminum, Black [SKU: ORG6581656]")
![Master Flow R50ABL Roof Louver, 17-1/2 in L, 17.4 in W, Aluminum, Black [SKU: ORG6581656]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/1280x1280/products/34387/33057/6581656__54587.1683068787.jpg?c=1 "Master Flow R50ABL Roof Louver, 17-1/2 in L, 17.4 in W, Aluminum, Black [SKU: ORG6581656]")
Product Overview
Square-top metal utility vent, recommended for kitchen duct outlets and bathroom fan exhausts as well as ventilation, large capacity of full 50 sq-in of net-free ventilating area (NFA) per vent, versatile, available with square throat in heavy-duty aluminum, easy to install, pre-drilled nail holes with extra wide flashing area. CSA listed. [QTY/UOM: 1EA / 1EA] [PMS SKU: ] [Category: VENTILATION PRODUCTS/ROOF VENTILATORS;Shop All]
![Master Flow SSB960ABL Roof Louver, 18 in L, 20-1/2 in W, Aluminum, Black [SKU: ORG6247621]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/500x659/products/34464/33134/6247621__33050.1683068831.jpg?c=1 "Master Flow SSB960ABL Roof Louver, 18 in L, 20-1/2 in W, Aluminum, Black [SKU: ORG6247621]")
![Master Flow SSB960ABLF Roof Louver, 20-1/2 in L, 16 in W, Aluminum, Black, Roof Installation [SKU: ORG8150112]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/500x659/products/34370/33040/8150112__58843.1683068779.jpg?c=1 "Master Flow SSB960ABLF Roof Louver, 20-1/2 in L, 16 in W, Aluminum, Black, Roof Installation [SKU: ORG8150112]")
![Master Flow SSB960A Roof Louver, 18 in L, 20-1/2 in W, Aluminum, Mill [SKU: ORG6247613]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/500x659/products/34461/33131/6247613__02927.1683068829.jpg?c=1 "Master Flow SSB960A Roof Louver, 18 in L, 20-1/2 in W, Aluminum, Mill [SKU: ORG6247613]")
![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]")
![Master Flow SSB960AW Roof Louver, 18 in L, 20-1/2 in W, Aluminum, White [SKU: ORG6247654]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/500x659/products/34439/33109/6247654__19020.1683068818.jpg?c=1 "Master Flow SSB960AW Roof Louver, 18 in L, 20-1/2 in W, Aluminum, White [SKU: ORG6247654]")