18" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w32h32 improves airflow

improves airflow

Actual Filter Size – 17 3/4"w x 31 3/4" x 1"

If you are looking to enhance your project with a top-of-the-line unit

with actual front end outer dimensions of 7"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 14" duct opening (measured at the opening)

18" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w32h32 improves airflow+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 10" OR 10" X 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 75" x 9. 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