16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille + Product Details Size –

+ Product Details Size – 20" x 34" or 34" x 20" is the size for the duct opening measurement only

9% Pure Copper meeting ASTM B280 standards

+ Product Details Size – 10"w X 2"h is the size for the duct opening measurement only

Durable and Long-Lasting – Built with high-impact clear plastic and premium materials for dependable performance

Air Flow – Ensure a quiet and smooth HVAC system with noise-free components

16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 30" OR 30" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 29. 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