26" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling with filter the actual front end outer

the actual front end outer dimensions are 10" in diameter

+ Product Description Introducing the 6" Butterfly Damper – Your Solution for Controlled Airflow

For a visual guide on how to measure your vent hole before ordering a grille

See our separate listing for T-Bar supply grille

+ Product Details Size – 8"w X 8"h is the size for the duct opening measurement only

26" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling with filter the actual front end outer+ Product Details Size 26"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27. 875" width X 20" height. High Quality High quality steel construction, no scuff powder coat durable finish, smooth, shiny, scratch resistant, no sharp edges, 2 recessed screw holes on each side with screws included, screws same color as vent cover, easy installation. Adjustable airflow control Adjustable airflow