4" X 12" Modern Victorian Floor Register Grille With Dampers - Decorative Grate - HVAC Vent Duct Cover - Matte Black Fixed Blades with Damper actual front end outer dimensions

actual front end outer dimensions are approximately 20 5/8" width X 24 5/8" height

Actual Filter Size – 33 3/4"w x 23 3/4" x 1"

Actual Filter Size – 25 3/4"w x 33 3/4" x 1"

+ Product Details Size – 18"w X 18"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

4" X 12" Modern Victorian Floor Register Grille With Dampers - Decorative Grate - HVAC Vent Duct Cover - Matte Black Fixed Blades with Damper actual front end outer dimensions4" 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