16" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14in diameter + Product Details Size -

+ Product Details Size - 6"w X 34"h is the size for the duct opening measurement only

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+ Product Details Size - 30"w X 16"h is the size for the duct opening measurement only

+ Product Details Size – 20"w X 36"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 36" OR 36" x 30" duct opening (measured at the opening)

16" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14in diameter + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 10" OR 10" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 9. 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