34" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14" Round Duct Pipe Versatile Compatibility: Our ceiling grills

Versatile Compatibility: Our ceiling grills aren't limited to just T bar drop ceilings

+ Product Details Size – 28" x 30 or 30" x 28" is the size for the duct opening measurement only

+ Product Description Maximize the efficiency of your ventilation system with our top-of-the-line HVAC grilles and registers

75"H – fits a 30" X 6" duct opening

We pride ourselves on offering top-of-the-line products that meet the highest standards

34" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14" Round Duct Pipe Versatile Compatibility: Our ceiling grills+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 36" OR 36" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 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