30" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14" Diameter Rigid Built For External Use–

Rigid Built For External Use– The sturdy and rigid design features noise free components that eliminates vibration and excess noise to the louvers

easy unrestricted airflow

75" width X 25

+ Product Details Size - 4"w X 20"h is the size for the duct opening measurement only

+ Product Details Size – 6" x 24" or 24" x 6" is the size for the duct opening measurement only

30" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14" Diameter Rigid Built For External Use–+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 28" OR 28" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 27. 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