24" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Material_Aluminum Actual Filter Size – 27

Actual Filter Size – 27 3/4"w x 27 3/4" x 1"

this grille enhances air circulation

+ Product Details Size - 18"w X 16"h is the size for the duct opening measurement only

It features an eight-tumbler lock with a supplied key for secure access

Adjust the airflow to your preference by simply opening or closing the top panel

24" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Material_Aluminum Actual Filter Size – 27+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 22" OR 22" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 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