36" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14" Diameter and yet lightweight and easy

and yet lightweight and easy to handle

actual front end outer dimensions are approximately 31 5/8" width X 24 5/8" height -

actual front end outer dimensions are approximately 26 5/8" width X 10 5/8" height -

75"H – fits a 10" X 6" duct opening

36" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14" Diameter and yet lightweight and easy+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 35. 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 Made from