Atco 70 Series 17002410 Insulated Flexible Duct, 25 ft L, Fiberglass/Polyester, Gray

ATCO #070 are UL 181, class 1 air ducts and are manufactured with a tri-directional fiberglass scrim reinforced, grey polyester outer jacket. The inner core of all the products is air-tight and designed for low-to-medium operating pressures in HVAC systems.