22" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Supply Grille + Product Details Size –

+ Product Details Size – 6"w X 10"h is the size for the duct opening measurement only

To Maximize Ventilation Results

Installs Directly On Round & Oval Spiral Duct - No Frames

+ Product Details Size - 20"w X 16"h is the size for the duct opening measurement only

22" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Supply Grille + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 34" OR 34" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 33. 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