14" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Return complete with a set of

complete with a set of sponge gasket and mounting frame

actual front end outer dimensions are approximately 34 5/8" width X 28 5/8" height

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

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 24" or 24" x 12" duct opening (measured at the opening)

14" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Return complete with a set of+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 6" or 6" x 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 5. 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 Made