20" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 12in vibration-free performance

vibration-free performance

+ Product Details Size – 25"w X 36"h is the size for the duct opening measurement only

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

actual front end outer dimensions are 26

20" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 12in vibration-free performance+ 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