20" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 12in And One Towards The Bottom

And One Towards The Bottom Of The Door

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 34" or 34" x 12" duct opening (measured at the opening)

+ Product Details Size – 24" x 32" or 32" x 24" is the size for the duct opening measurement only

actual front end outer dimensions are 26

+ Product Details Size – 14" x 36" or 36" x 14" is the size for the duct opening measurement only

20" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 12in And One Towards The Bottom+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 10" OR 10" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 9. 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