18" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w26h26 + Product Details Size -

+ Product Details Size - 34"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 8" x 24" or 24" x 8" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 20 5/8" width X 34 5/8" height

+ Product Details Size - 28"w X 36"h is the size for the duct opening measurement only

18" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w26h26 + Product Details Size -+ Product Details Size 18"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 875" width X 8" 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