office chair mechanism,one lever for height adjustment;another lever for tilting of seat and back bar at same time

Multi-functional office chair mechanism

1.one lever for height adjustment;

2.another lever for tilting of seat and back bar at same time

3.Tension knob for height adjustment of chair back

4.Initial to final angle of seat:0-8.5 degree

5.Initial to final angle of back:85-115 degree

6.Made to accept gas lift.