6 mm Solar Low 'E' Toughened Outer, 12 mm Cavity, 18 mm TSG DCT18 (glass-poly-glass) Inner., 6 mm Solar Low 'E' Toughened Outer, 12 mm Cavity, 20 mm TSG DCT20 (glass-poly-glass) Inner.
6 mm Solar Low 'E' Toughened Outer, 12 mm Cavity, 18 mm TSG DCT18 (glass-poly-glass) Inner., 6 mm Solar Low 'E' Toughened Outer, 12 mm Cavity, 20 mm TSG DCT20 (glass-poly-glass) Inner.