10" x 12" or 12" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 14.5"] ceiling + Product Details Size -

+ Product Details Size - 24"w X 12"h X 2"d (for duct opening measurement only)

+ Product Details Size - 8"w X 22"h is the size for the duct opening measurement only

Upgrade your air distribution strategy today – invest in the efficiency and convenience of the 8" Radial Damper

+ Product Details Size – 18"w X 24"h is the size for the duct opening measurement only

10" x 12" or 12" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 14.5"] ceiling + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 10" x 12" or 12" x 10" duct opening (measured at the opening), with actual outer dimensions of 12. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 9. 75" x 11. 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