14" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 12" Diameter + Product Details Size -

+ Product Details Size - 18"w X 24"h is the size for the duct opening measurement only

expanding or retracting the gap to meet your precise needs

and Diffusers

+ Product Details Size - 14"w X 10"h is the size for the duct opening measurement only

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14" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 12" Diameter + Product Details Size -+ Product Details Size 14"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 875" width X 14" 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