The Unitex Wall Terminal Large Louvre integrates an external weather louvre, wall sleeve, and duct connection spigot into a single unit for easy installation. The satin anodised louvre provides full protection against the elements. This model includes a 280mm wall sleeve section, with an optional 80mm sleeve available, and supports spigot connections from 100mm to 400mm. Finished with epoxy powder coating, it is suitable for commercial ventilation applications. Stock reference: QSA400/280.