2. Single or insulating glass could be adopted. Space between glass is available at 6, 9, 12mm.
3. The rigidity of the window body is very high. Such window is safe and durable, suitable for various high buildings.
4 The surface of profile could be treated through highly oxidization , fluorin-carbon, electrostatic spray and phoresic varnish etc. And be made into various colors, very beautiful, and could be painted into colors of stainless steel and imitate wood patten etc.
5. Select metal parts of good quality, which open and close freely.
