1. Office chair

2. Place the office chair upside down on a table. Dismantle the base with the stand tube.

3. Loosen the screw with the black handle (turn anticlockwise)

4. Place LIFTEX onto gas cylinder.

5. Slide LIFTEX down to the bottom so that the lower, half-moon shaped edge sits on the mechanism (under no circumstances must it sit on a telescopic tube or similar). Tighten the black handle (clockwise)

6. Press handle down.

7. Take off LIFTEX with gas cylinder.