16" x 28" or 28" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w32h32 actual front end outer dimensions

actual front end outer dimensions are approximately 34 5/8" width X 14 5/8" height

actual front end outer dimensions are approximately 27 5/8" width X 38 5/8" height

Achieve superior control over your indoor airflow for a more comfortable space

+ Product Details Size - 26"w X 4"h is the size for the duct opening measurement only

16" x 28" or 28" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w32h32 actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 28" OR 28" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 27. 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