Round Metal Pipe Reducer & Increaser | 5" to 4" or 4" to 5 HVAC Duct Reducer or Increaser 30g Gauge | Galvanized Sheet Metal Ducting Connector 16" Diameter + Product Details Size -

+ Product Details Size - 30"w X 20"h is the size for the duct opening measurement only

+ Product Details Size: 30w x 40h cm

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

featuring a mud and flange installation design

+ Product Details Size - 6"w X 20"h is the size for the duct opening measurement only

Round Metal Pipe Reducer & Increaser | 5" to 4" or 4" to 5 HVAC Duct Reducer or Increaser 30g Gauge | Galvanized Sheet Metal Ducting Connector 16" Diameter + Product Details Size -+ Product Details Size & Compatibilty The 5" to 4" round metal pipe reducer & increaser 30 gauge is compatible with duct 5" to 4". Made in the USA Premium Quality Our galvanized ducting connector is made of high quality galvanized sheet metal. Applications Reducers transition ducts from larger to smaller sizes and ensure smooth, continuous airflow. + Product Description The HVAC Premium Round Metal Pipe Reducer & Increaser is crafted from high quality