12" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Aluminum Bar + Product Details Size - 4" Round Duct Pipe Product Details Size The SHEASC10W1-HP

+ Product Details Size - 20"w X 32"h is the size for the duct opening measurement only

75" Width X 9

actual front end outer dimensions are approximately 36 5/8" width X 16 5/8" height

High quality – high quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

+ Product Details Size - 30"w X 18"h is the size for the duct opening measurement only

12" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER HVAC Vent Duct Cover Sidewall or Ceiling Aluminum Bar + Product Details Size 4" Round Duct Pipe Product Details Size The SHEASC10W1 HP + Product Details Size 20"w X 32"h is the size for the duct opening measurement only 75" Width X 9