14" x 16" or 16" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum - Cube Core 75"H – fits a 8"

75"H – fits a 8" X 4" duct opening

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 36" OR 36" x 24" duct opening (measured at the opening)

[Outer Dimensions: 16

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 36" OR 36" x 22" duct opening (measured at the opening)

14" x 16" or 16" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum - Cube Core 75"H – fits a 8"+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 16" OR 16" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 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