16" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling return filter With its compact size and

With its compact size and high-quality materials

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with actual outer dimensions of 20

+ Product Details Size - 26"w X 4"h is the size for the duct opening measurement only

+ Product Details Size - 28"w X 32"h is the size for the duct opening measurement only

16" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling return filter With its compact size and+ Product Details Size 16"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 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