24" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter steel actual front end outer dimensions

actual front end outer dimensions are approximately 23 5/8" width X 7 5/8" height

+ Product Details Size - 24"w X 18"h is the size for the duct opening measurement only

adds a touch of sophistication to any room

Horizontal performance assures confident use of cooling temperature differential of 30 degrees Fahrenheit and greater

actual front end outer dimensions are approximately 38 5/8" width X 10 5/8" height

24" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter steel actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 8" OR 8" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 75" x 7. 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