1) PVC-stell co-extrusion,strong 2)anti-age,save ,heat insullation 3)good price,good service and good quanlity PVC windowStyle-casement windowsProfile- 2.5mm thickness with 3,4,5 chamberProfile color-white and other colors are available,double color coextrusion profile,lamination colors and wood grainSteel-0.8mm-1.2mm stainless steel put into pvc profilesGlass-5mm, 6mm, 5mm+6A+5mm,6mm+9A+6mm,6mm+ ...