32" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Copper Coil-Insulated Line Set + Product Details Size -

+ Product Details Size - 8"w X 16"h is the size for the duct opening measurement only

Actual Filter Size – 15 3/4"w x 17 3/4" x 1"

+ Product Details Size – 24"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 16" x 24" or 24" x 16" is the size for the duct opening measurement only

32" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Copper Coil-Insulated Line Set + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 20" OR 20" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 17. 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