When you do not use the window screen, you can let the screen back into the tumble by freeing it.   Finzone 07 is used to match our frameless window. The window screen is a tumble type with spring set. When you do not use the window screen, you can let the screen back into the tumble by freeing it. This hidden type of window screen is not suitable for any types of windows frame. We choose high-quality voile as the window screen material so that it can have good function of preventing mosquito.  Finzone 07 frame makes of aluminum alloy .