These cylinders seem to be made well. They are called "universal fit" but I found that the outer diameter of my exisiting cylinder case (the black part) was very slightly larger than this replacement unit. When I attempted to simply set the new unit into the chair's plastic roller base, the cylinder would wobble slightly inside the roller base when I sat in the chair, which was annoying. But, by removing the retainer clip (at the base of the black slide casing) and extracting the gas cylinder along with the washers and swivel rollers, I was able to transplant everything into the original black slide casing. The retainer clip is a bit tricky to work with but it is not rocket science. You will need a small screwdriver to slide it out of the groove and a small pair of channel locks to slide it back into its groove.Read full review
Verified purchase: Yes | Condition: New
One size fits all refers only to the circumference of the top and bottom which fit into the chair slots; the cylinder itself was too long, left my feet (I'm about 6') barely touching the floor and would compress no more. I tossed it rather than spend more to ship it back; bought another.
Verified purchase: Yes | Condition: New
I bought this for an older Aeron chair. The actuator rod at the top of the cylinder is too long, the mechanism in the chair keeps it depressed, so it just goes down when I sit in the chair. However, someone in the office with a non-Aeron chair had a bad cylinder, they are quite happy.
Verified purchase: Yes | Condition: New
Rather than spend $300.00 for a replacement office chair, I ordered 2 heavy duty gas shocks ($33.00), and bingo, chair is perfect again, and there is a spare shock on the shelf for the next time. They don't last forever, but you can count on them for a few years. Thanks.
Verified purchase: Yes | Condition: New
Product was as advertised, but not heavy duty enough for my use, because cylinder failed, consider using only for people weighing less than 200#. My fix: added 2 blocks of wood to fix chair height.
Verified purchase: Yes | Condition: New