Round Metal Pipe Reducer & Increaser | 6" to 4" HVAC Duct Reducer or Increaser 30g Gauge | Galvanized Sheet Metal Ducting Connector is Compatible with Duct 4" 14" Diameter Perforated steel grille for return

Perforated steel grille for return air flow

ID tubing with 16 mm or 18 mm connections

Unlike traditional doors that have visible frames and hinges

+ Product Details Size – 20"w X 40"h is the size for the duct opening measurement only

Round Metal Pipe Reducer & Increaser | 6" to 4" HVAC Duct Reducer or Increaser 30g Gauge | Galvanized Sheet Metal Ducting Connector is Compatible with Duct 4" 14" Diameter Perforated steel grille for return+ Product Details Size & Compatibilty The 6" to 4" round metal pipe reducer & increaser 30 gauge is compatible with duct 6" 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