The WDS SL 60 system has a 60 mm installation depth and three internal chambers, giving it rigidity without adding visual bulk. Steel reinforcement is mandatory in all sashes, ensuring that the construction maintains its shape over the years.
- Installation depth: 60 mm
- Three internal chambers
- Steel reinforcement in all sashes
- Visible sash width: 39 mm
- Maximum sash size: 1500 × 1500 mm

