8" x 10" or 10" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 12.5"] Powder Coated Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 33 3/4" x 1"

14"w X 8"h Is The Size For The Duct Opening Measurement Only

Whether you're updating a single room or renovating an entire space

The first number in a grille size represents the width

+ Product Details Size - 10"w X 36"h is the size for the duct opening measurement only

8" x 10" or 10" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 12.5"] Powder Coated Actual Filter Size – 31+ Product Details Perfect Fit & Easy Sizing Designed for a 8" x 10" or 10" x 8" duct opening (measured at the opening), with actual outer dimensions of 10. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 7. 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 Made