... , flexible hose, aluminum flexible ducting, aluminium flexible ducting, flexible duct, acoustic, insulated, combi ducting, flexible hose, aluminum flexible ducting, aluminium Aluminium Flexible DuctingApplication: Its a range of fully flexible uninsulated ... .Construction: Its constructed with an inner duct (Aluminium) with either 25mm or 50mm fiberglass insulation and covered with an outer jacket, ...