24" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Width_20in + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 14" or 14" x 8" duct opening (measured at the opening)

16" x 3" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply

Design – Removable door/face for easy filter change & cleaning - uses a 1" thick filter

For added protection

24" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Width_20in + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 12" OR 12" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 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