1. Rectangular appearance all round – both inside and outside.
2. Sash invisible from the outside.
3. Seamless sash design with no glazing beads and flush sightline thanks to 4. optimal clip profile
5. Unique surface quality thanks to exclusive acrylcolor technology on the outside.
6. Innovative STV® bonding technology for a "borderless" sash design guarantees maximum stability.
7. Outstanding heat insulation thanks to foam-filled profile chambers.