Air duct uninsulated flexible aluminum And d 102kh10m

Are made standard diameter from 102 to 315 mm.
The general thickness of layers is 45 microns. In quality the high-carbonaceous stalnayaprovoloka karkasaispolzutsya. Mezhvitkovy distance from 19 mm. Working temperature from - 35 to + 100C.
The maximum positive pressure is 2500 Pas. Air ducts are delivered with a standard length of 10 m, packed into individual cardboard packing.