Aluflex: Flexible duct with steel spiral reinforcement. 3 (7 microns thick) layers of aluminum, in combination with two layers of polystyrene (thickness 12 microns). Reflective surface. ...

Aluflex: Flexible duct with steel spiral reinforcement. 3 (7 microns thick) layers of aluminum, in combination with two layers of polystyrene (thickness 12 microns). Reflective surface. Better ...