20" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 1-Way + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 34" or 34" x 8" duct opening (measured at the opening)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 28" OR 28" x 22" duct opening (measured at the opening)

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+ Product Details Size – 6" x 22" or 22" x 6" is the size for the duct opening measurement only

Actual Front End Outer Dimensions Are 10" Diameter

20" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 1-Way + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 32" OR 32" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 31. 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