10" x 8" Decorative Wood Supply Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction - [Outer Dimensions: 12w X 10"h] 8" Diameter The operable dampers

The operable dampers

Actual Filter Size – 35 3/4"w x 7 3/4" x 1"

+ Product Details Size - 4"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 30"w X 16"h is the size for the duct opening measurement only

With a 5" diameter for the duct opening measurement

10" x 8" Decorative Wood Supply Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction - [Outer Dimensions: 12w X 10"h] 8" Diameter The operable dampers10"w X 8"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 12" Width X 10" 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