Aluminium Polyester made Flexible Ducting ensures that foil is also bonded together using quality adhesive and reinforced with high carbon corrosion-proof spring wire. The Flexible Ducting is made of2, 3 and 4ply multi-layered aluminium polyester and metalized polyester which ensures optimum durability along with long lasting trouble free service. The Flexible Ducting is non-flammable and more efficient in nature. Aluminium Polyester made Flexible Ducting is compact in construction and requires minimal maintenance.