16" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grille you can't go wrong with

you can't go wrong with this decorative grill

actual front end outer dimensions are approximately 20 5/8" width X 20 5/8" height

+ Product Details Size - 8"w X 20"h is the size for the duct opening measurement only

Crafted from high-quality red oak wood

+ Product Details Size – 10"w X 2"h is the size for the duct opening measurement only

16" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grille you can't go wrong with+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 20" OR 20" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 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