... 2.Good performance with the mulitiple functions aluminium louver window frames 1.Material:UPVC &PVC,Aluminum ,as per ... chose the colour you want.3.Glass:Single glass,Double glasses,Low-e glass,Toughened glass,Insulated glass,and ... 0mm,so on10.Acoustical insulattion:31dB11.K-value of window:2.6w/m2.k12.Wind resistance:3700pa13.Air ... street , HuangQi Town , Nanhai District ,Foshan City, China louver