34" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grille Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 16" X 12" duct openings

actual front end outer dimensions are approximately 10 5/8" width X 28 5/8" height

+ Product Details Size - 24"w X 34"h is the size for the duct opening measurement only

Actual Filter Size – 27 3/4"w x 15 3/4" x 1"

34" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grille Ideal for Walls & Ceilings:+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 8" Or 8" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 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