1.Material:aluminum 2.it can be 4times longer after stretch 3. high temperature resistant Duable Quality Semi Rigid Aluminum Duct 1.Material:aluminum2.Features:made of aluminum with thickness 0.06-0.10mm,iptional 9 corrugation or 4 corrugation,temperature range from -30 to 150 degree.max air flow:30m/s,mas operaton pressure:10000pa3.Application:used in kitchen room and sanitaryware,hot air,how ...