8" x 36" or 36" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 38.5"] Color_R-4.2 Yellow actual front end outer dimensions

actual front end outer dimensions are approximately 22 5/8" width X 20 5/8" height -

screws same color as vent cover

10"w X 6"h Is The Size For The Duct Opening Measurement Only

+ Product Details Size - 12"w X 28"h is the size for the duct opening measurement only

8" x 36" or 36" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 38.5"] Color_R-4.2 Yellow actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 8" x 36" or 36" x 8" duct opening (measured at the opening), with actual outer dimensions of 10. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 7. 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