8" x 20" or 20" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 22.5"] white + Product Spec Sheet Round

+ Product Spec Sheet Round Ceiling Diffuser Spec Sheet

ready to cut for size of vent pipe

actual front end outer dimensions are approximately 28 5/8" width X 16 5/8" height

+ Product Details Size – 48"w X 24"h is the size for the duct opening measurement only

+ Product Details Size – 16" x 20" or 20" x 16" is the size for the duct opening measurement only

8" x 20" or 20" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 22.5"] white + Product Spec Sheet Round+ Product Details Perfect Fit & Easy Sizing Designed for a 8" x 20" or 20" x 8" duct opening (measured at the opening), with actual outer dimensions of 10. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 7. 75" x 19. 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