GAF Master Flow F6IFD Flexible Insulated Air Duct Pipe, 6 in x 25 ft, Fiberglass Yarn

Two-ply continuous inner core products, smooth interior for more efficient air movement Vapor barrier, durable and scuff-resistant jacket Zinc-coated, high-carbon steel wire helix Thick, continuous blanket of glass fiber insulation Metalized single-strand fiberglass yarns for added strength and tear-resistance