Specifications

Features:
1) Design complying with the European standards, can be installed hardware
accessor

Features:
1) Design complying with the European standards, can be installed hardware 
    accessories in Europe standards
2) Opens the window in the way of interior-open-interior-tilt
3) Designed to drain off water in equal tension cavity with excellent airtight 
    performance
4) Having notch around for inserting aluminium, so the corner-group is smooth without 
    aluminium-revealing
5) Rational structure and easy to process