16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Supply Grille actual front end outer dimensions

actual front end outer dimensions are approximately 34 5/8" width X 22 5/8" height

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 4" duct openings

75" Width X 37

Actual Filter Size – 25 3/4"w x 17 3/4" x 1"

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16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Supply Grille actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 30" OR 30" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 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