32" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Round Duct Pipe + Product Details Size –

+ Product Details Size – 8"w X 18"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 22" OR 22" x 26" duct opening (measured at the opening)

+ Product Details Size - 4"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are 19

32" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Round Duct Pipe + 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