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 [Outer Dimensions: 16

[Outer Dimensions: 16

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

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

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 32" or 32" x 8" duct opening (measured at the opening)

actual front end outer dimensions are approximately 28 5/8" width X 16 5/8" height

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 [Outer Dimensions: 16+ 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