14" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_White Filter Size - 25

Filter Size - 25

Ring Base Design – Allows for easy installation without removing the thermostat

+ Product Details Size - 30"w X 36"h is the size for the duct opening measurement only

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Actual Filter Size – 19 3/4"w x 11 3/4" x 1"

14" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_White Filter Size - 25+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 10" or 10" x 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 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