What makes a chair with permanent contact mechanism?
• A: Automatic adjustment of the seat height:
The seat height can be adjusted by gas cartridge.
• B: Adjusting the backrest angle:
The chairs with permanent contact mechanism allow adjusting the inclination of the backrest. The backrest can be set to the angle chosen by the user or leave it in "permanent contact".
• C: Height adjustment of the backrest:
The backrest height of the chairs of permanent contact can be adjusted independently of the seat. How to regulate it may vary with the model being the two most common forms: With handle at the rear of the backrest or ratchet mechanism (also called Up-Down).
• D: Regulation of the separation between seat and backrest:
In some models is also possible to vary the separation with knob located under the seat.