34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 8" Ideal for Walls & Ceilings:

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

+ Product Details Size – 18" x 22" or 22" x 18" is the size for the duct opening measurement only

order a 14x20 grille

height: 22px

+ Product Details Size - 20"w X 14"h is the size for the duct opening measurement only

34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 8" Ideal for Walls & Ceilings:+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 12" Or 12" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 11. 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