12" x 6" Decorative Wood Supply Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction - [Outer Dimensions: 14w X 8"h] Outdoor Vent Covers fasten the edges to studs

fasten the edges to studs with the provided screws

All of these grills have dampers

+ Product Details Outer dimensions: 7

+ Product Details Size - 40"w X 20"h is the size for the duct opening measurement only

12" x 6" Decorative Wood Supply Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction - [Outer Dimensions: 14w X 8"h] Outdoor Vent Covers fasten the edges to studs12"w X 6"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 14" Width X 8" Height SEE IN DESCRIPTION HOW TO MEASURE A GRILLE Slim Sliding Metal Damper To Control and Adjust Airflow Slots Are Angled to Diversify The Airflow In 2 Way Direction Great for Wall and Floor & ceiling Applications Roundover Beveled Edges Polished Pre Finish Gloss Varnish Ready To Install Can Also Be Sanded And Re finished According To