34" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter with filter + Product Details Size –

+ Product Details Size – 10" X 4" is the size for the duct opening (floor/vent hole) measurement only

making it a reliable choice for improving indoor air quality

actual front end outer dimensions are approximately 27 5/8" width X 28 5/8" height

but still light and handy

34" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter with filter + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 32" Or 32" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 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