... , ISO9001 German style special shape timber window, casement, window-with safety glass Adopting the German IV68 series door and window system ... are 5mm/6mm+9A/12A/16A+5mm/6mm, safety glass for option. 4. Accessory: Heat insulation strip: polymer nylon 66 from Germany ... door. German style special shape timber window, casement, window-with safety glass