10" x 36" or 36" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 38.5"] Supply Grille Actual Front End Outer Dimensions

Actual Front End Outer Dimensions Are 16" Width X 8" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

Actual Filter Size – 24 3/4"w x 9 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 16" or 16" x 6" duct opening (measured at the opening)

+ Product Details Size – 25"w X 18"h is the size for the duct opening measurement only

10" x 36" or 36" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 38.5"] Supply Grille Actual Front End Outer Dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 10" x 36" or 36" x 10" duct opening (measured at the opening), with actual outer dimensions of 12. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 9. 75" x 35. 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