... acoustic, insulated, combi ducting, flexible hose, aluminum flexible ducting, PVC flexible ducting, flexible duct, acoustic, insulated, combi ducting, flexible ... of fully flexible reinforced, lightweight Aluminium Polyester and PVC laminated duct specially designed for the HVAC Market. ... The lamination of the layers of Aluminium Polyester and PVC into one single product gives extra strength, durability ...