4" X 14" Floor Register with Louvered Design - Heavy Duty Rigid Floor Air Supply with Damper & Lever - Outer Dimensions [ 5.5 X 15.5] - Light Grey Color_Anodized Aluminum + Product Details Size -

+ Product Details Size - 18"w X 20"h is the size for the duct opening measurement only

High Quality – A uniquie combination of cotton & synthetic fibers gives you the most filtration and the least air resistance - equals great air & easy airflow for your system

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 28" or 28" x 6" duct opening (measured at the opening)

Color-coded handles for easy identification

4" X 14" Floor Register with Louvered Design - Heavy Duty Rigid Floor Air Supply with Damper & Lever - Outer Dimensions [ 5.5 X 15.5] - Light Grey Color_Anodized Aluminum + Product Details Size -4" X 14" Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 4. 5" X 12. 5" SEE BELOW IN DESCRIPTION How To Measure A Grille Why HVAC Premium? You may think of grilles and registers as a generic component of the ventilation system in your house. But they are also the most visible representation of your air system. These grilles and registers give you an extra measure of quality that are visible to your family