TD Flexible Duct is a high standard flexible duct recommended to be used in air conditioning system and ventilation system. TD Flexible Duct is made up of 2 layer aluminium core, which consists of mechanical spring wire helix. The core is later wrapped in glass wool with a density of 24 or 16 Kg/m held by strong double layer aluminium sleeve. The use of glass wool for insulation will result a good temperature insulation and noise reduction.