80*150-400mm Aluminum Alloy Air Vent Louvred Grill Ventilation Grille Cover Vents Perforated Sheet Web Plate
https://www.vogueparade.com/shopping/EN/200366148/1/1005002969696536/80150-400mm-aluminum-alloy-air-vent-louvred-grill-ventilation-grille-cover-vents-perforated-sheet-web-plate//