34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 8" the actual front end outer

the actual front end outer dimensions are 10" in diameter

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 12" OR 12" x 32" duct opening (measured at the opening)

order a 14x20 grille

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 20" or 20" x 6" duct opening (measured at the opening)

actual front end outer dimensions are approximately 22 5/8" width X 36 5/8" height

34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 8" the actual front end outer+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 12" Or 12" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 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