4" X 12" Modern Victorian Floor Register Grille With Dampers - Decorative Grate - HVAC Vent Duct Cover - Matte Black ceiling + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 36" OR 36" x 18" duct opening (measured at the opening)

If your filter opening is 14" wide by 20" long

But the benefits don't stop there

L/H@0 FT: 38

4" X 12" Modern Victorian Floor Register Grille With Dampers - Decorative Grate - HVAC Vent Duct Cover - Matte Black ceiling + Product Details Perfect Fit4" X 12" Is The Size For The Duct Opening (floor vent hole) Measurement Only, Actual Front End Outer Dimensions Are 5. 5" X 13. 5" SEE BELOW IN DESCRIPTION HOW TO MEASURE A GRILLE Solid Rigid Steel Body For Durability and Reliability With Dampers Operate able by Switch For Airflow Directional Control Premium Plated Finish and Modern Victorian Design Forming a Luxurious & Impressive Piece For Your Home Quality Packaging Carefully Shrink Wrapped With