the inner of the product is soft hose. It’s outside is wrapped by glass wool blanket of 25mm thick and 24kg/cubic meter. The damp-proof outside package is composited by the aluminum foil and glass fiber cloth. It is mainly suitable for central air-conditioning and ventilation

The product has good capacities of flame resistance, stress tolerance and insulation, and is very flexible to install easily.
 

Technical parameters:

Size range(diameter): 52-610mm;  temperature range: -30° ~ +140°;  Celsius Density: 20-30kg/m3;  maximum air velocity: 30m/s;  maximum working pressure: 2500pa;  derivative coefficient: 0.034w/mk.