32" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Black + Product Details Size –

+ Product Details Size – 20"w X 14"h is the size for the duct opening measurement only

16" Diameter Is The Size For The Duct Opening Measurement Only

+ Product Details Size – 24"w X 32"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 30 5/8" width X 32 5/8" height

Measure the size of the air duct/drywall opening

32" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Black + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 26" OR 26" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 25. 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