6" x 12" or 6" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 14.5"] Compatible with Duct 6" actual front end outer dimensions

actual front end outer dimensions are approximately 25

+ Product Details Size - The listed 5" diameter refers specifically to the size of the duct opening

Multi-shutter damper with handle operator to adjust air flow

Actual Filter Size – 7 3/4"w x 11 3/4" x 1"

3 * Insulation density is 30kgs/CBM = 0

6" x 12" or 6" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 14.5"] Compatible with Duct 6" actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 6" x 12" or 12" x 6" duct opening (measured at the opening), with actual outer dimensions of 8. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 5. 75" x 11. 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