34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grille our Round Air Vent Supply

our Round Air Vent Supply Grille is the perfect addition

+ Product Details Size – 22" x 30" or 30" x 22" is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 30" OR 30" x 22" duct opening (measured at the opening)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 12" OR 12" X 18" duct opening (measured at the opening)

Ideal for Walls & Ceilings: Designed for seamless installation in standard 16" X 16" duct openings

34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grille our Round Air Vent Supply+ 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