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100MM WHITE LOUVERED WALL VENT GRILLE: Square ventilation grille with fixed blade louvres, designed for 100mm (4 inch) round ducting and extractor fan connections; features a 155 x 155mm external faceplate and rear spigot for compatible ventilation pipes and duct fittings FIXED BLADE AIR OUTLET & INLET GRILLE: White plastic louvred vent cover designed for air extraction and ventilation systems; the fixed angled blades provide an external ventilation opening for compatible ductwork while helping reduce direct exposure to wind and rain DURABLE WHITE PLASTIC VENT COVER: Made from robust plastic for indoor and outdoor ventilation applications; the square wall ventilation grille provides a neat finish for external walls, bathrooms, kitchens, utility rooms and other areas requiring air circulation EASY INSTALLATION WITH 4 INCH REAR SPIGOT: Designed for connection to compatible 100mm round ducting, flexible hose and ventilation fittings; the wall-mounted extractor fan grille offers a practical duct outlet solution for external walls, roof soffits, fascia and general ventilation systems VERSATILE BATHROOM & KITCHEN EXTRACTOR FAN VENT: Suitable for compatible bathroom extractor fans, kitchen ventilation, utility rooms, shed vents, hydroponics systems and in-line extract fans; ideal for residential ventilation, air conditioning ducting and general air inlet or outlet applications