Aluminum ventilation grill - All industrial manufacturers
Air Vent Aluminum, Aluminium Grill with Insects Net 200 x 200 mm (8 x 8 inches), Outdoor Ventilation Grid 20 x 20 cm, Anodized Alumiun Air Vent with Mesh, (Aluminum, 20 x 20): Amazon.co.uk: DIY & Tools
Amazon.com: Aluminium Louvre Air Vent Ventilator Grille Cover 9 X 9 225Mm X 225Mm by DIRECT HARDWARE