18" x 26" or 26" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18" Diameter much more than required 700

much more than required 700 PSI for R410

actual front end outer dimensions are approximately 26 5/8" width X 16 5/8" height

ensuring consistent and efficient air distribution throughout your space

875" width X 10" height

with no sharp edges to worry about

18" x 26" or 26" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18" Diameter much more than required 700+ 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