14" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum - Cube Core The total outer size of

The total outer size of this grille is the listed size plus 2 and 5/8"

The grille comes with all necessary screws for a secure fit

including the ability to mount without removing the thermostat when using the ring base

R value rating of insulation - R3

14" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum - Cube Core The total outer size of+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 10" or 10" x 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 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