28" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum Adjustable Curved Blade + Product Details Size –

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

875" width X 18" height

With its reliable construction and sleek design

actual front end outer dimensions are approximately 10 5/8" width X 8 5/8" height

complete with a supplied key

28" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum Adjustable Curved Blade + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 32" OR 32" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 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