... system secures the window and the window perimeter tightly.3. Glass: 5mm, 6mm, 11mm (5mm+6A+5mm), 19mm (5mm+9A+5mm ... +16A+5mm)etc; single-glass, double-glasses, triple-glazing are available clear glass, tempered galss, floated glass, refective glass, coated glass (Low-e glass), patterned glass4.Size ...