26" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling RG66 Black-HP + Product Details Size –

+ Product Details Size – 28"w X 8"h is the size for the duct opening measurement only

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actual front end outer dimensions are approximately 34 5/8" width X 28 5/8" height

+ Product Details Size - 24"w X 36"h X 2"d (for duct opening measurement only)

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26" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling RG66 Black-HP + Product Details Size –+ 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