flexible duct for class B flame retardant PVC with wear-resistant plastic strips wrapped high carbon spring steel is refined, soft cloth, high strength and tear resistance to acid, corrosion resistance, cold-resistant, heat-resisting, waterproof, fire retardant.

flexible duct can retractable, arbitrary bending, connect freedom, lightweight; easy to carry.

Environmental protection products is non-toxic, no smell, no dust, no fiber. seamless tube , with no air leakage, wear-resistant, low wind resistance, compressive strength, etc.

The cloth thickness 0.4mm-0.65mm, the main color is orange. Other colors: gray, white, blue, red, black, green, etc.

Flexible duct diameter Ф4〃 -Ф59 〃（100mm─1500mm） usual length 5m or 10m, can be available.

Temperature: -15 ℃ to +80 ℃ (cold resistance or high temperature hose optional)

With the ventilation equipment is widely used in mining excavation, exhaust ventilation and dust, exhaust gas, engine room, basements, tunnels, municipal engineering, shipbuilding machinery engineering, mining ventilation equipment, fire smoke, poor working environment and air supply and exhaust, dust removing function.