... , acoustic, insulated, combi ducting, flexible hose, aluminum flexible ducting, PVC flexible ducting, flexible duct, acoustic, insulated, combi ducting, flexible hose ... encapsulated high tensile steel wire helix.Advantages: Supplied in standard 10 metre length, compressed to 0.4 - 0.6 metre; ... of strength and tear resistance.Advantages: Supplied in standard 10 metre length, compressed to 1.0-1.2 metre; ...