26" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Diameter + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 36" OR 36" X 16" duct opening (measured at the opening)

+ Product Details Size - 8" X 8" is the size for the duct opening measurement only

Elevate your air system today and enjoy improved aesthetics and efficient airflow for a comfortable living environment

this grille seamlessly drops into the designated place

26" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Diameter + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 18" OR 18" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 20. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 17. 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