20" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter RV Mobile Home Whether you're updating a single

Whether you're updating a single room or renovating an entire space

All steel wire is applied between PET surfaces to prevent corrosion (oxidization)

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

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20" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter RV Mobile Home Whether you're updating a single+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 36" OR 36" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 35. 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