26" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Round Damper Ring + Product Details Size -

+ Product Details Size - 32"w X 18"h is the size for the duct opening measurement only

with actual front end outer dimensions of 7"

strong aluminum construction with smooth finished edges for easy and safe use

Our Aluminum Ceiling Diffuser is not only a design marvel but also a practical choice for your HVAC system

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

26" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Round Damper Ring + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 28" OR 28" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 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