30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter steel accordion-title { font-size: 17px

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

+ Product Details Size - The listed 12" diameter refers specifically to the size of the duct opening

Commercial Grade Aluminum - Will Never Rust - Designed for Warehouses

this air supply register is ideal for sidewall and ceiling applications

30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter steel accordion-title { font-size: 17px+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 6" OR 6" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 5. 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