30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w24h24 Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 6" duct openings

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 30" OR 30" x 32" duct opening (measured at the opening)

Its smooth

+ Product Details Size - 22"w X 10"h is the size for the duct opening measurement only

Marked circles for cutout

30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w24h24 Ideal for Walls & Ceilings:+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 6" OR 6" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 5. 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 Made