24" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Diameter engineered for seamless 360-degree airflow

engineered for seamless 360-degree airflow in T-bar ceilings

actual front end outer dimensions are approximately 35

Actual Filter Size – 11 3/4"w x 7 3/4" x 1"

Heavy-Duty Construction: Powder-coated finish prevents rust

+ Product Details Size – 28"w X 30"h is the size for the duct opening measurement only

24" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Diameter engineered for seamless 360-degree airflow+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 16" OR 16" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 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