M19800 is an insulating system for folding doors with 50mm sash thickness and special rolling hinges of heavy duty type. The last vent may be used as an entrance door. The system offers two typologies:
- Top hanging solution, with the rolling hinges running on top, inside the guide
- Floor-standing solution, with the rolling hinges sliding on the bottom guide
| Sash thickness | 50 mm |
| Top hanging solution | 250 kg per upper roller and 125 kg per leaf |
