Stepless seat height adjustment with Toplift (LGA tested). High, contoured backrest with spine shape, continuously adjustable in height and inclination. Special intervertebral disc seat for optimum support in the pelvic area. Permanent contact mechanism for adjusting the backrest inclination, continuously adjustable. Black polyamide base, equipped with load-dependent braked safety double castors for carpets. This model bears the LGA-tested mark of the LGA Nuremberg and fulfills all safety-relevant requirements for the living area.