20" X 20" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 6" Diameter + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 12"w X 14"h is the size for the duct opening measurement only

Can be hooked up with our Butterfly Dampersfor precise airflow control

+ Product Details Size – 26"w X 18"h is the size for the duct opening measurement only

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+ Product Details Size - 12"w X 36"h is the size for the duct opening measurement only

20" X 20" ADJUSTABLE AIR SUPPLY DIFFUSER HVAC Vent Duct Cover Sidewall or Ceiling 6" Diameter + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 12"w X 14"h is the size for the duct opening measurement only Can be hooked up with our Butterfly Dampersfor precise airflow control