Connector Plus Flexible Duct Connector is the premium Heavy Duty manufactured flexible duct connector, offering quality unmatched by others. 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' rolls readily dispense from a bench-high carton. Connector Plus excels in isolating vibrations produced by air handling units, fans, blowers and other HVAC equipment.