22" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Round Duct Pipe + Product Details Size -

+ Product Details Size - 20"w X 22"h is the size for the duct opening measurement only

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

We pride ourselves on offering top-of-the-line products that meet the highest standards

[Outer Dimensions: 38

our damper is designed to perfectly align with your setup

22" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Round Duct Pipe + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 18" OR 18" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 20. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 17. 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