30" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Width_20in accordion-title:hover { background-color: #f0f0f0

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Actual Filter Size – 21 3/4"w x 23 3/4" x 1"

Roundover Beveled Edges

Ideal for Walls & Ceilings: Designed for seamless installation in standard 10" X 8" duct openings

actual front end outer dimensions are approximately 32 5/8" width X 36 5/8" height

30" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Width_20in accordion-title:hover { background-color: #f0f0f0+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 29. 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 from