18" x 26" or 26" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18" Diameter + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 32" or 32" x 8" duct opening (measured at the opening)

with no sharp edges to worry about

ensuring consistent and efficient air distribution throughout your space

much more than required 700 PSI for R410

or commercial environments

18" x 26" or 26" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18" Diameter + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 26" OR 26" x 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 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