24" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Black + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 30" OR 30" x 28" duct opening (measured at the opening)

as the multidirectional design ensures consistent temperature control

The integrated eight-tumbler lock system

+ Product Details Size – 36"w X 30"h is the size for the duct opening measurement only

24" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Black + Product Details Perfect Fit+ 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