1)Window Frame Dimension and Installation Hole Dimension A4:78*98 80*100 A6: 78*118 80*120 A8: 78*140 80*142 B6: 114*118 116*120 B8: 114*140 116*142

2)Protection Board: Made of good quality aluminium alloy, waterproof, anticorrosive, sunproof and rotproof;

3)Window Frame & window sash: Selected high quality european deal, wood grain remains after treatment;

4)Glass: double layer hollow glass;

5)Slide Axis Hinge: making it possible to stop at any position, any angle, able to rotate for 160 degrees for easy cleaning outer glass; 
6)Curtain: various style and color curtain could be installed;

7)Control Pole: flexible enough to open the window.