Replacement 7" black gas lift for office chairs.
 
Chair gas lifts can fail after years of use so this is an ideal replacement. Suitable for up to 115kg weight limit. 250mm - Extends to 340mm Ideal replacement for office chairs.
 
If you are replacing a failed gas lift, you will need to hit the existing gas lift out of the base with a rubber mallet - they can be stubborn.  The replacement will drop straight into the base and will edge in place when weight is applied to the chair.