30" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14" Diameter listed size +2" diameter

listed size +2" diameter

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 6" OR 6" x 30" duct opening (measured at the opening)

+ Product Details Size – 34"w X 36"h is the size for the duct opening measurement only

75" width X 25

30" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14" Diameter listed size +2" diameter+ 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