ALF 25 aluminum flex pipe DN 25 mm Fully Flexible ventilation pipe from zweila-stranded polyester film aluminiumbeschich-off. Built-in spiral spring to stiffen. Smallest bending radius, any rückbiegbar, no material fatigue, no leak. No toxic gas release in case of fire extinguishing. Operating temperature of -2 ° C to
2 degrees C, maximum operating pressure of 25 Pa, max. Flow velocity of 3 m / s Make: Helios No.: 57
6 Type: ALF 25 ______________________________________