20" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Floor Grille actual front end outer dimensions

actual front end outer dimensions are approximately 18 5/8" width X 12 5/8" height

+ Product Details Size – 32"w X 25"h is the size for the duct opening measurement only

+ Product Details Size – 12"w X 20"h is the size for the duct opening measurement only

Actual Front End Outer Dimensions Are 5

but still very thin

20" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Floor Grille actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 24" OR 24" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 23. 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