36" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter d + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 16" OR 16" x 20" duct opening (measured at the opening)

Q: Why BLACK

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 10" OR 10" x 28" duct opening (measured at the opening)

+ Product Details Size - 14"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 24"w X 26"h is the size for the duct opening measurement only

36" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter d + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 22" OR 22" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 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