Backbar with up-down system for height-adjustment of the backrest. The up-down system is made of flat wired steel and is available both in size 70×6 or 80×6, with total travel of 75 mm. This item can be customized based on customers’ needs. The backrest can be removed by disconnecting the up-down system from the backbar. By doing so, the backrest can be laid on the seat, thereby requiring little room for packaging and thereby reducing transportation costs significantly.