36" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w10h10 engineered for seamless 360-degree airflow

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

Actual Filter Size – 21 3/4"w x 11 3/4" x 1"

Horizontal blades in the front

Actual Filter Size – 7 3/4"w x 13 3/4" x 1"

36" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w10h10 engineered for seamless 360-degree airflow+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 14" OR 14" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 13. 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