14" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum + Product Details Outer dimensions:

+ Product Details Outer dimensions: 21

+ Product Details Size – 16" x 30" or 30" x 16" is the size for the duct opening measurement only

back blades made of black plastic for reduced air noise and discreet appearance

Whether installed on a sidewall or ceiling

this guard is designed to provide maximum protection against tampering while maintaining a clean and professional appearance

14" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum + Product Details Outer dimensions:+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 6" or 6" x 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 5. 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