22" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter d Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 8" duct openings

With a sleek

+ Product Details Size - 18"w X 12"h is the size for the duct opening measurement only

Filter Size - 17

+ Product Details Size - 32"w X 18"h is the size for the duct opening measurement only

22" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter d Ideal for Walls & Ceilings:+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 16" OR 16" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 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