18" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Return Grille ensuring your space stays dry

ensuring your space stays dry and secure

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powder-coated finish adds a touch of elegance while also being scratch-resistant

+ Product Details Size – 24" x 36" or 36" x 24" is the size for the duct opening measurement only

18" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Return Grille ensuring your space stays dry+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 16" OR 16" X 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 75" x 15. 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