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with actual outer dimensions of 38
+ Product Details Size – 28" x 30 or 30" x 28" is the size for the duct opening measurement only
provides a modern look and quiet operation due to its half-inch by half-inch cube design
We pride ourselves on offering top-of-the-line products that meet the highest standards
Versatile Compatibility: Our ceiling grills aren't limited to just T bar drop ceilings
34" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14" Round Duct Pipe with actual outer dimensions of+ 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