Connector Plus flexible duct connector for Engel or Lockformer machines is the premium heavy duty manufactured flexible duct connector for applications where the connector is required to be run through an automatic flanging machine. Made for industrial and commercial applications, Connector Plus is available in a variety of special fabrics and is made with prime G-90 galvanized steel, aluminum or 316 stainless steel. The continuous 100 ft roll steadily dispense from a bench high carton. Connector Plus excels in isolating vibrations produced by air handling units, fans, blowers and other HVAC equipment.