34" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall the actual front end outer

the actual front end outer dimensions are 10" in diameter

actual front end outer dimensions are approximately 38 5/8" width X 32 5/8" height -

+ Product Details Size - 18"w X 18"h X 2"d (for duct opening measurement only)

actual front end outer dimensions are approximately 26 5/8" width X 30 5/8" height

34" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall the actual front end outer+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 16" Or 16" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 15. 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