16" x 32" or 32" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18" Diameter Solid Base for Stability –

Solid Base for Stability – Built with a solid base for reliable mounting and stability

+ Product Details Size - 30"w X 16"h is the size for the duct opening measurement only

All of these grills have dampers

+ Product Details Size - 14"w X 28"h is the size for the duct opening measurement only

16" x 32" or 32" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18" Diameter Solid Base for Stability –+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 32" OR 32" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 31. 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