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Venti Air 8 in. Wide x 24 in. High Return Air Filter Grille of Steel in White HFG0824 - The Home Depot
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Custom Vogue Vent Cover Supply (White) - 10" x 7" opening size (12" x 9" overall) with mounting holes, with air deflector - Vent and Cover
Return Air Grille for and 18" x 18" opening. 21" x 21" overall size. Square design. Black finish. - Majestic Vent Covers
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MroMax 1Pc 15.75" x 3.15" (LxW) Air Vent Aluminum Alloy Square Ventilation Grille Cover 400mm x 80mm Rectangle Air Grille for Walls and Ceilings HVAC Cabinets - - Amazon.com
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Custom Pro-Linear Vent Cover Return Air Filter Frame (White) - 23.5" x 23.5" opening size (26-1/8” x 26-1/8” overall size) With mounting holes - Vent and Cover
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