12" x 28" or 28" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Diameter Complies with industry standards of

Complies with industry standards of USA: ASTM D-882

Both lines taped together every 18in for easier handling & installation

allowing you to take control of indoor air circulation without complications

Quality Packaging – Every part is hand inspected for quality before it is packaged

Transform your space's exterior with our reliable and stylish louvers today

12" x 28" or 28" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Diameter Complies with industry standards of+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 28" or 28" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 75" x 27. 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