Round Metal Pipe Reducer & Increaser | 9" to 8" HVAC Duct Reducer or Increaser 30g Gauge | Galvanized Sheet Metal Ducting Connector is Compatible with Duct 8" Compatible with Duct 4" + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 20"w X 18"h is the size for the duct opening measurement only

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

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+ Product Details Size & Compatibility – The 10" stick-on Side take-off is compatible with duct 10"

actual front end outer dimensions are approximately 18 5/8" width X 14 5/8" height -

Round Metal Pipe Reducer & Increaser 9" to 8" HVAC Duct Reducer or Increaser 30g Gauge Galvanized Sheet Metal Ducting Connector is Compatible with Duct 8" Compatible with Duct 4" + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 20"w X 18"h is the size for the duct opening measurement only actual front end outer dimensions are approximately 16 5 8" width X 36 5 8" height