14" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 2-Way Deflection our damper is designed to

our damper is designed to perfectly align with your setup

actual front end outer dimensions are approximately 27 5/8" width X 18 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 14" or 14" x 8" duct opening (measured at the opening)

[Outer Dimensions: 16

+ Product Details Size - 8" X 8" is the size for the duct opening measurement only

14" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 2-Way Deflection our damper is designed to+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 12" or 12" x 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 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