Dear sir, 4mm Low - E Glass, used in the inner side to the room,. then 20mm Cavity space with filled with Air or Orgon Gas in the middle with spacer ,. then 4mm Low - E Glass to the Outside side of the house. Awning Window Winder with keys,. Also confirm if your glass has AS2208 and Windows are to AS2047 Kind regards P.Kanb (China Glass Network)
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