Flexible duct made with the following materials from the inside out:

- film of additive polyolefin resins 60 micron thick;

- Built-in spiral in harmonic steel wire;

- thermo-insulating coating 17 mm/11kg/m³ thick in polyester fiber;

- external anti-steam protection in additive polyolefin resin.

The assembly of materials, in order to build the flexible duct, does not require the use of adhesive chemicals or adhesives. Working temperature: -20°C/+90°C (-4F/194F)(+100°C / 212 F tips). Color: grey. Reaction to fire: class 1-M1. Max. pressure: 200 mm approx. Max air speed: 20 m/s.

Minimum bending radius: 0.8 ÷ 1.5 times the diameter (depending on diameters).