20" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w22h22 High Quality Aluminum – The

High Quality Aluminum – The premium durable aluminum will never rust and it will never wear through leaving the material with an elegant

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 34" Or 34" x 32" duct opening (measured at the opening)

with no sharp edges

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

20" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w22h22 High Quality Aluminum – The+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 28" OR 28" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 27. 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