Insulated Flexible Duct (IFD Series)
UL-181 Class 1 Air Duct
Insulated flexible air duct
Thick 1-1/4" continuous fiberglass insulation
Zinc coated, high carbon steel wire helix
Continuous blanket of glass fiber insulation
Durable UV inhibited outer jacket
Black Polyethylene Jacket
R-Value 4.2
