1.Frame&Sash Thickness：1.4mm；Out frame：100mm/118mm/138mm width2.Glass Sash:Outward opening；Gauze Sash:Inward opening3.Hardware Slot:K Slot Design，no necessary to mill the slot for installing the wind brace4.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 should cut in 90° then connect by screw，and sash should cut in 45°then connect by angle connector to connect6.Glass slot：25mm；could install with 5mm+12A+5mm tempered glass