The series Alousystem 550, falls into the category of thermo-Tilt discontinued aluminum systems and is supported by multiple peripheral locking mechanism. Namely special mechanism that "locks" around the sheet around the frame (up to 24 locks), making it virtually unbreakable (with the presence of such glazing).

The series is made from robust profiles mechanically seamed together with polyamide of 24mm and features perimeter locking shaft 13 rows and 8 mm push sex onto the frame. This specification is unique compared with other competing systems.

The system allows the construction of very large frames that despite increased their weight can seamlessly to handle impaired use and stress.

Between the floor and door frames also inserted special profile made ​​of PVC, which gives overall advantages to the system such as:

Abolished rubbers, feature facilitates the placement process.
Further increases the percentage of the total thermal break.
Due to the protection of the frame system (Boxing) thus removing the structural materials of the support, elongates the life of the frame.