16" x 24" or 24" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Round Duct Pipe + Product Details Size -

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

This grille has a high standard of design

but you’ll appreciate the benefits over a long period of time

+ Product Details Size - 20"w X 6"h is the size for the duct opening measurement only

angle them down for effective warmth distribution

16" x 24" or 24" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Round Duct Pipe + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 24" OR 24" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 21. 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