10" x 14" or 14" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 16.5"] Aluminum Adjustable Curved Blade Actual Filter Size – 23

Actual Filter Size – 23 3/4"w x 25 3/4" x 1"

75"H – fits a 12" X 6" duct opening

+ Product Details Size - 34"w X 36"h is the size for the duct opening measurement only

Actual Filter Size – 19 3/4"w x 24 3/4" x 1"

10" x 14" or 14" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 16.5"] Aluminum Adjustable Curved Blade Actual Filter Size – 23+ Product Details Perfect Fit & Easy Sizing Designed for a 10" x 14" or 14" x 10" duct opening (measured at the opening), with actual outer dimensions of 12. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 9. 75" x 13. 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