... .Multiple functions,such as,heat insulated,anti-aging,water proof 2012 Hot Sale UPVC &Aluminum Venetian Blinds.(Factory)1.Material:UPVC &PVC,Aluminum ... .2mm,1.5mm,2.0mm,so on11.Acoustical insulattion:31dB12.K-value of window:2.6w/m2.k13.Wind resistance:3700pa14 ... , Baisha CunDong street , HuangQi Town , Nanhai District ,Foshan City, China 2012 Hot Sale Aluminum Venetian Blinds(factory)