Sheath 80-100 mm

All 80-100mm aluminum ventilation ducts, cheap ventilation ducts, or soundproof ventilation ducts, try combi ventilation ducts, double layer aluminum and plastic insulation ducts, try winflex phonic ventilation duct with high quality virgin wool and does not scratch, with microperforated aluminum inner duct, or phonic plus with microperforated woven duct 100mm, find your cheap ventilation ducts at the leader of ventilation in France, make your choice of 80 and 100mm duct