6" x 32" or 32" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 32.5"] Compatible with Duct 8" accordion dd { margin: 0

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+ Product Details Size – 32"w X 8"h is the size for the duct opening measurement only

+ Product Details Size – 6" round duct opening-

Design – Individually adjusting curved blades for better air flow control

actual front end outer dimensions are approximately 30 5/8" width X 14 5/8" height

6" x 32" or 32" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 32.5"] Compatible with Duct 8" accordion dd { margin: 0+ Product Details Perfect Fit & Easy Sizing Designed for a 6" x 32" or 32" x 6" duct opening (measured at the opening), with actual outer dimensions of 8. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 5. 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 Made