1.use PE insulation material,more healthy
2.more soft and without dust

Main Product Specifications:

Diameter Range: 4''~20(102-508mm)

Temperature Range: -30°C ~140°C

The highest air flowing speed: 2500Pa

Glass fibre thickness: 25mm

Glass fibre density: 20kg/m³

Standard length: 10m

Flexible thermally insulated duct are made of standard flexible duct. Apply for low/medium/high pressure air ventilation and air condition systems.At high temperatures or in case of  fire, no toxic gas emission. Easy to install oval round connection.