24" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling steel /* Adding space between bullet

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actual front end outer dimensions are approximately 10 5/8" width X 26 5/8" height

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

+ Product Details Size – 16" x 16" is the size for the duct opening measurement only

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24" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling steel /* Adding space between bullet+ Product Details Size 24"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 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