aluminum flexible air duct 1. 3,4,5,6,8,10,12,14,16 ... 2. -30~+140, 30m/sec, 2500pa 3. samples are ready aluminum flexible air ductConstruction:2 Layersaluminum+polyesterApplication: Its a range of fully ... flexible uninsulated aluminium/polyester laminated ducting, which has been specially designed ...