6" x 22" or 22" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 24.5"] 14in diameter + Product Details Size –

+ Product Details Size – 30"w X 14"h is the size for the duct opening measurement only

4" X 10" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated

+ Product Details Size - 34"w X 18"h is the size for the duct opening measurement only

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6" x 22" or 22" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 24.5"] 14in diameter + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 6" x 22" or 22" x 6" duct opening (measured at the opening), with actual outer dimensions of 8. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 5. 75" x 21. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum Made