1.Frame&Sash Thickness：1.4mm；Out-frame：80mm width2.Glass Sash:Outward opening；Gauze Sash:Inward opening3.Hardware Slot:European Standard Design，could match any standard accessories4.This system designs with three cavity to meet the requirement of energy-saving，and it always use the wood grain on the indoor and other surface treatment on the outdoor.5.Frame&Sash should cut in 45then connect by the angle connector.6.Glass slot：24mm；could install with 5mm+12A+5mm tempered glass7.The distance of window and gauze is 33.6mm，could install the sharp handle8.Depending on the wall thickness，it could install the covered inside or outside and both.9.Could install grid frame independently