UAS Solo Greyduct non-insulated reinforced PVC flexible air ducts running low and medium pressure heating, cooling, ventilation, air conditioning, waste gas and dust have been specially designed for transfer systems, a multi-purpose non-isolated (non-isolated), flexible air channel. Excessive vibration and / or systems requiring constant mobility can be used. Extremely resistant, strengthened with reinforced PVC strips made of high-tensile steel wire helix. UAS Solo Greyduct flexible air ducts sealed. UAS Solo Greyduct extremely high stretching, bending and compressibility features. Oval, round and corner assembly parts are easy to install.