24" x 32" or 32" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w26h26 + Product Details Size -

+ Product Details Size - 14"w X 4"h is the size for the duct opening measurement only

+ Product Details Size – 24" x 28" or 28" x 24" is the size for the duct opening measurement only

75" width X 21

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

24" x 32" or 32" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w26h26 + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 32" OR 32" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 75" x 31. 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