14" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum - Cube Core R value rating of insulation

R value rating of insulation - R3

to Ensure Perfect Smooth Finish

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 6" or 6" x 14" duct opening (measured at the opening)

providing a stylish and practical solution for ventilation

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

14" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum - Cube Core R value rating of insulation+ 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