24" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder Coated Actual Filter Size – 23

Actual Filter Size – 23 3/4"w x 29 3/4" x 1"

actual front end outer dimensions are approximately 36 5/8" width X 8 5/8" height

Rigid Built For External Use– The sturdy and rigid design features noise free components that eliminates vibration and excess noise to the louvers

Its heavier gauge construction guarantees durability and longevity

24" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder Coated Actual Filter Size – 23+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 12" OR 12" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 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