26" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18in diameter Suitable For Floor Wall &

Suitable For Floor Wall & ceiling Applications

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 12" OR 12" X 18" duct opening (measured at the opening)

High Standard Quality - Every part is hand inspected for quality before it is packaged

+ Product Details Size - 4"w X 32"h is the size for the duct opening measurement only

Crafted with top-notch quality aluminum

26" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18in diameter Suitable For Floor Wall &+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 16" OR 16" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 15. 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