20" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Return + Product Details Size –

+ Product Details Size – 20"w X 10"h is the size for the duct opening measurement only

with actual outer dimensions of 10

See our separate listing for Butterfly Dmaper to Control Airflow

With plain ends

Made of High Quality Aluminum That Will Never Rust

20" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Return + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 26" OR 26" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 25. 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