Master Flow F8ifd6x300 Insulated Flexible DUCT, 6 in, 25 ft L, Fiberglass, Silver

Metalized jacket, single strand fiberglass yarns for added strength and tear resistance. 2 in thick glass fiber. Two-ply continuous inner core products, smooth interior for more efficient air movement. 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.