36" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 10in Filter Size - 13

Filter Size - 13

+ Product Description This aluminum flex duct is intended to be used in heating

actual front end outer dimensions are approximately 24 5/8" width X 14 5/8" height

[Outer Dimensions: 10

this grille boasts a sleek frame that ensures a refined and seamless look

36" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 10in Filter Size - 13+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 20" OR 20" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 19. 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