36" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 10" actual front end outer dimensions

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

+ Product Details Size - 28"w X 30"h is the size for the duct opening measurement only

Overall Size:

+ Product Details Size – 10" X 2" is the size for the duct opening (floor/vent hole) measurement only

36" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 10" actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 6" OR 6" x 36" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 5. 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