Material: aluminium foil (laminated) + steel wire. The duct high carbon steel wire is helical with a narrow pitch, preventing mould breakage. The special laminated construction with two layers of aluminium foil provides excellent durability and airtightness, as well as heat resistance, Safe to use: lightweight, practical and integrally moulded to ensure ventilation. Heat resistant fan enclosure from -30°C to +100°C. aluminium hose to keep smoke and moisture away from the living area. Saves space: the flexible ducting is made of aluminium, which is both elastic and flexible. The bellows construction allows it to be freely bent and extended to suit the area and location of use, saving a lot of space. The bellows design makes it easy to use as it can be bent freely. The length can also be extended and retracted for easy adjustment. Easy to install: flexible, bendable and meets different installation requirements. Easy and simple to install with just one set. Soft and easy to install. Easy to install: flexible duct is easy to cut with metal scissors or a standard wire cutter. It offers excellent flexibility and can be freely compressed and bent to suit a variety of installation angles., Weight: 1.3448197982 Pounds, Manufacturer: CXGfdghD