Flexible silencers have an inner tube of non-woven fabric, enclosed by a 25-mm insulation blanket and an outer jacket of laminated aluminium. The ends are finished per length. Sound absorption according to the European Norm EN-ISO 7235:2003. Suitable for ventilation and air conditioning systems, mechanical aeration systems, prevention of condensation and reduction of machine noise. Can be used at temperatures between -25 °C and +90 °C.