Flexible pipe made of additivated polyolefin film resins and spiral in a harmonic steel thread.• colour: black;• operating temperature: -20/+90°C (+110°C peaks);• radius of curvature: 0.8-1.5xø;• air speed: max 20m/sec;• pressure: max 200mm approx;• fire reaction class 1 (D.M. 26/06/84).