1.burglar proof metal window 2.double shutters/open,with grille for security 3.white/black/blue color 4.in different size Regular size:H300xW600mm,single top openH300xW1200mm,double top openH600xW600mm,single openH600xW1200mm,double openH900xW1200mm,double openH1200xW600mm,single openH1200xW1200mm,double openH1200xW1800mm,three openH1500xW1800mm,three open and three top open steel security window ...