... Semi-rigid Aluminum DuctSA - aluminumApplication The corrugated aluminum is twisted to form a continuous airtight lock-seamSA-type air duct is ... applications requiring a product that is both durable and reliableTechnical data (Xuanyuan Factory) Material of DuctAluminumThickness of Duct0.08mm,0 ... 250 °CAvailable Length3m,6m (can be compressed to 1m,2m)Available Diameters2",3",4",5",6",7",8",9",10",12" ...