System of seating with shell in 3D ply forming technology in several wood finishes or totally upholstered in fabric or leather. 4 star aluminium base, 4 legs base or sled base, which are either mat chromed or lacquered. Stool with three different fix height in the same finishes of the chair or height adjustable with swivel seat and base covered by a stainless steel sheet with “linen fabric pattern”. Its seat can also be totally upholstered.