20" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter fixed bar + Product Details Size -

+ Product Details Size - 14"w X 30"h is the size for the duct opening measurement only

+ Product Details Size – 32"w X 12"h is the size for the duct opening measurement only

+ Product Details Size – 12" x 26" or 26" x 12" is the size for the duct opening measurement only

Solid Base Construction – Features a solid base for stable installation and reliable protection

Example: If your hole is 20" wide by 14" tall

20" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter fixed bar + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 16" OR 16" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 15. 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