22" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum Adjustable Curved Blade + Product Details Size –

+ Product Details Size – 20"w X 26"h is the size for the duct opening measurement only

+ Product Details Size - 4"w X 36"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 27 5/8" width X 30 5/8" height

actual front end outer dimensions are approximately 10 5/8" width X 20 5/8" height

22" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum Adjustable Curved Blade + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 21. 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 Made from