The Fabriflex Type 3 non-insulated flexible air duct features a reinforced aluminized trilaminate spirally wound and mechanically locked together by a corrosive resistant galvanized steel helix. This tear resistant ULC-S110 and UL-181 Class 1 product is supported by the outside metal helix ,which with the resilient duct liner, provides the product integrity necessary to obtain both positive and negative high-pressure ratings. 
Air Ducts