16" x 32" or 32" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak preventDefault()

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+ Product Details Size - 10"w X 12"h is the size for the duct opening measurement only

+ How To Measure A Round Vent Overall Size:

High Quality – Polished pre-finish gloss varnish ready to install - can also be sanded and re-finished according to application needs

+ Product Details Size - 36"w X 10"h is the size for the duct opening measurement only

16" x 32" or 32" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak preventDefault()+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 32" OR 32" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 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