14" x 25" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper + Product Details Size –

+ Product Details Size – 4"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 34"w X 10"h is the size for the duct opening measurement only

Actual Filter Size – 13 3/4"w x 19 3/4" x 1"

+ Product Details Size - 25"w X 24"h is the size for the duct opening measurement only

Design – Fixed hinged for easy filter change & cleaning - uses a 1" thick filter

14" x 25" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 25" OR 25" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 27. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 24. 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