32" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 27 3/4" x 1"

actual front end outer dimensions are approximately 37

Ideal for Walls & Ceilings: Designed for seamless installation in standard 16" X 4" duct openings

Actual Filter Size – 19 3/4"w x 21 3/4" x 1"

32" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall Actual Filter Size – 13+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 16" OR 16" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 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