32" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Brown actual front end outer dimensions

actual front end outer dimensions are approximately 38 5/8" width X 36 5/8" height

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+ Product Details Size – 14"w X 4"h is the size for the duct opening measurement only

+ Product Details Size – 24" x 36" or 36" x 24" is the size for the duct opening measurement only

Actual Filter Size – 11 3/4"w x 11 3/4" x 1"

32" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Brown actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 12" OR 12" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 11. 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