6" x 32" or 32" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 32.5"] Color_White For 12" Round Duct Opening

For 12" Round Duct Opening - Spiral or Flex

+ Product Details Size – 8"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 20"w X 24"h is the size for the duct opening measurement only

Our grilles feature a durable powder-coat finish

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 20" OR 20" X 14" duct opening (measured at the opening)

6" x 32" or 32" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 32.5"] Color_White For 12" Round Duct Opening+ Product Details Perfect Fit & Easy Sizing Designed for a 6" x 32" or 32" x 6" duct opening (measured at the opening), with actual outer dimensions of 8. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 5. 75" x 31. 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 Made