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

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

actual front end outer dimensions are approximately 16 5/8" width X 30 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 14" or 14" x 10" duct opening (measured at the opening)

please note that the total outer dimensions of the grille measure 8" in diameter

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

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