30" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Brown See chart below:

See chart below:

with actual front end outer dimensions of 10"

+ Product Details Size – 10"w X 30"h is the size for the duct opening measurement only

Elevate the performance and appearance of your ventilation system today

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 12" OR 12" x 30" duct opening (measured at the opening)

30" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Brown See chart below:+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 20" OR 20" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 19. 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