... require the same with purchase,lenght:2-12mm window frames,steel window,window scantlings,Thickness:0.5-2.0mm, ... mm)Thickness(mm)Length(mm)window frames-U28*28*280.5-2.02000-12000window frames-C6*33*20*33*60.5 ... -2.12000-12000window frames-C6*28*17*28*60 ... .5-2.22000-12000window frames-rectangular20*28*20*280.5 ...