28" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12in diameter + Product Details Size –

+ Product Details Size – 16" x 32" or 32" x 16" is the size for the duct opening measurement only

With a 6" diameter for the duct opening measurement

adds a luxurious touch to any home

+ Product Details Size – 12"w X 34"h is the size for the duct opening measurement only

28" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12in diameter + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 24" OR 24" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 23. 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