GM-C85 Insulation Window

GM-C85 Insulation Window GM-C85 Insulation Window is a new kind of building material, it can be used for good inside lighting and keep the temperature indoor. Good inside lighting: With GM-C85 Insulation Window, frame is smaller than others; Better thermal retardation: GM-C85 Insulation Window has better thermal insulation technology, it can prevent temperature exchange. In summer it can save electricity from reducing the use of air conditioning, and in winter it can keep