energy saving, building supplies integrated window with inner opening and inverted window screen, wood aluminum composite aluminum-wood comp

high-strength 6060-t66, wall thickness 1.8~2.5 aluminum, healthy ventilation inside + inside swing function german winkhaus rc2 anti-theft hardware, handle german hoppe, safety functionality of all windows: can be equipped with gold-steel gauze integrated window for insect prevention and protection germany imported schlegel.q-lon coated main sealing strip (main sealing position of fan frame), jiangyin haida sealing strip; the water-based paint for wooden windows imported from germany is non-toxic and environmentally friendly, does not contain harmful solvents, and does not contain tdi;.syi