34" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Filter Grille Filter Size - 23

Filter Size - 23

Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 4" duct openings

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

Pack of 4 Pieces

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34" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Filter Grille Filter Size - 23+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 22" Or 22" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 21. 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