18"w X 6"h ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Cover Sidewall or Ceiling - Grille Register - High Airflow - White [Outer Dimensions: 20"w X 8"h]<br><br>18"w X 6"h Is The Size For The Duct Opening Measurement Only Actual Front End Frame Outer Dimensions Are 19.75"w X 7.75"h - SEE BELOW IN DESCRIPTION HOW TO MEASURE A GRILLE<br><br></b><br><br><br>You may think of grilles and registers as a generic component of the ventilation system in your house.<br> But they are also the most visible representation of you air system.<br> These grilles and registers give you an extra measure of quality that you can point out to your family members and house guests.<br> Some of our best features aren’t readily apparent, but you’ll appreciate the benefits over a long period of time.<br> This grille has a high standard of design, production and finish on all products.<br><br><br> <b>Every part is hand inspected for quality before it is packaged, no exceptions.</b><br> Quality Packaging - Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment<br> Easy Unrestricted Air Flow.<br><br><br> <b>How To Measure A Grille</b><br> <b>Overall Size:</b><br> Measure the size of the air duct/drywall opening. Do not measure the overall size of the register itself, only measure the ""hole"" in the wall/duct. Every grille has a front end frame, that will overlap at wall joint.<br> Total outer size of this grille is; listed size +1.875"" at the width, and + 2"" at the height.<br><br> <b>Width vs Height</b><br> The first number in a grille size, represents the width, the second number represents the height. Example: If your hole is 20"" wide by 14"" tall, order a 20x14. If your hole is 14"" wide by 20"" tall, order a 14x20. <br><br><b>100% Satisfaction Guaranteed</b><p>Don’t worry, you’re covered by our 100% moneyback guarantee no questions asked. <b>Click Add to Cart Now!</b> and enjoy a new updated refreshing look to your home.</p>