6" x 10" or 6" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 12.5"] 3-Way or 4-Way + Product Details Size –

+ Product Details Size – 24"w X 24"h is the drop ceiling HVAC supply grille size - for T-Bar lay-in

Actual Filter Size – 17 3/4"w x 15 3/4" x 1"

and the second number represents the height

much more than the required 700 psi for r410

Actual Filter Size – 24 3/4"w x 15 3/4" x 1"

6" x 10" or 6" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 12.5"] 3-Way or 4-Way + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 6" x 10" or 10" x 6" duct opening (measured at the opening), with actual outer dimensions of 8. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 5. 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