em202/A mesh structure is made up of pressure die-cast aluminium lateral and transversal elements united in order to sustain and to keep stretched the elasticized mesh that form the seat. Polished aluminium or black or white lacquer finishes. Armrests in pressure die-cast aluminium with black or white polyurethane or upholstered in fabric elbow-rest. Seat and backrest are made up of a single frame with elasticized mesh fixed to the aluminium structure.This support has excellent resistance and “memory” characteristics and prevent the deformation of the seat even if it is used for a long time. The elesticized mesh guarantees a good perspiration and takes the shape of the user’s body in order to sustain the spinal column properly. Knee-tilt mechanism in aluminium with polished finish casing that can be locked in 4 positions, back resistance adjustment according to user weight with side telescopic lever and antishock locking/unlocking device. One more option is with a tilting device with lock/unlock system, and backrest resistance adjustment according to user’s weight. Height adjustment or automatic return system version is equipped with a pressure die-cast aluminium fork fixed under the seat. 5-spoke base in pressure die-cast aluminium. White or polished aluminium base with rubber-coated dual-tread self-locking castors Ø 60 mm for hard floors, or black base with hard castors for carpeted or linoleum floors Ø 65 mm. Slide frame in oval tubular steel chrome-plated or painted in black.