Off-heat Pull-and Push Window (series of 83, 90) Energy saving pull-and-push window, absorbing the highlights of the techniques of European and American energy saving windows. Double ring continuous seal, highly air-tight and water-tight. Single or hollow glass could be adopted. Hollow thickness is available at : 6, 9, 12mm. The rigidity of the window body is very big. Such window is safe and durable, suitable for various high buildings. 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 the color of stainless steel and imitate wood groove, etc. The window frame is clean free, maintenance free, durable, erosion resistant, aging resistant, anti-color fading, and with a life span of over 50 years. Selected metal parts of good quality, which open and close freely, convenient and durable.