MASTERY MART 9 Inches to 13 Inches Gas Lift Cylinder for Most Office Chair, 4" Stroke, Heavy Duty 1000lbs, Office Chair Gas Lift Cylinder Replacement, Class 4 Pneumatic Piston (Not for 1KEA, Black)

My 5 year old (but still very comfy) office chair had developed a tendency to lower itself at random, often in the middle of Zoom meetings. Having measured my existing cylinder, I ordered the required length and grith. This one seems to be a common size. It arrived next day, so I set aside a spare 15 minutes to fit it. It's just a tight push fit, but I had to get the old one off, so with my feet firmly on the base, and my hands clamped to the underside of the seat, I lay on my decking on my back, under the chair attempting to pull the two pieces apart. Lots of grunting ensued, but to no avail, although my neighbour wondered why I has having relations with a chair. Next came the lump hammer. A block of wood under the seat, and a well aimed clout with the hammer, and I had a sore thumb. My car jack was next, carefully placed on a block of wood. This separated the cylinder from the base! All I had to do now was pull it out from under the seat. Much more grunting and cursing later, and most of a can of WD40, I resorted to watching a YouTube video, which suggested using a pipe wrench. The young lady that was demonstrating it had no problem twisting the cylinder out, but I must be a bit weaker, as I had no luck, and had to hit the pipe wrench with a hammer. This worked! The new cylinder was a perfect fit, took seconds to put in place, and works perfectly. It stays up all night now and I have no worries about my nose and mouth slowly disapearing from sight in the middle of an important zoom call with my MD. Money well spent in my opinion. In short, if you can get the old one out, this one does the job perfectly!

Perfect replacement for Noble Chairs Hero gas lift. Relatively easy fit - I removed the whole tilt adjustment mechanism, gas lift and floor spider from the chair by removing the 4 x 6mm Allen key bolts, then removed the spider by clouting the end of the gas lift with a reasonably heavy hammer while holding on to the spider. Removal from the rest of the mechanism was easy enough with the aid of a bench vice clamped around the stem of the old gas lift and a bit of a twist of the top assembly. Reassembly was very straightforward and the chair (which is super comfortable) is now back at its proper height. No view on longevity of the replacement so far but the replacement was quick and painless and even if I have to do it every couple of years, it’ll be ok.

I bought this product as my gaming chair had broken and I was just about to replace the entire chair. I came across this item and it worked absolutely perfectly I've had saved me a fortune. Would absolutely recommend this

Was a good fit, functionally works, but has an issue of lifting it's self to full height over night from time to time, not that much of a big deal.

excellent product heavy duty and easy to fit...no issues whatsoever

The new cylinder was fine, fitted in seconds and works perfectly. The problem is removing the old one. No skill is needed, only a stillson wrench (the bigger, the better) a heavy hammer and brute strength! There are plenty of videos on YouTube, but basically you lay the chair on its side and clamp the stillson to the stem just below where it enters the chair. Then heave-ho, it isn't going to be easy! It doesn't matter which way you turn it, but you must force the tapered joint to release. It will help if whoever fitted it smeared it with grease first. When done, take the base unit outside and hit the base of the old cylinder really hard with a heavy hammer. Again, it's a tight taper fit and really heavy blows will be required. Once done, that's it - just pop the new one in. Don't forget to first replace any gaiters covering the cylinder, or you will be reaching for the stillson again!

Works very well looks stronger than the original one

Worked great. Installed on my MK2 Classic Aeron!

Es funcional, es lo que requeria

I would like to preface this by saying I am fairly strong. Like I have picked up a full size bar fridge by myself and lifted it onto a counter. I do not normally have trouble with things like this but when other reviews say the hardest part of replacing this part is getting the old canister out, believe them! So my chair had been randomly sinking for a few months, forcing me to stop and readjust it or type with my shoulders hunched up to my ears. Eventually it just would not stay in place and since I really like my chair and it wasn’t cheap, I decided to try and fix it. Read the reviews, compared prices, and settled on this one. The new cylinder arrived quickly and I watched a video on how to replace it. Very simple process. Great! I will be sitting like a proper human in no time. Needed a pipe wrench to get the old cylinder out of the chair, which was stiff but not bad, but when I got to the base it absolutely would. not. come. off. Wailing on it with a mallet, then a hammer, soaking in WD40 overnight, taking the wheels off so the cylinder could touch the floor and standing - then jumping - on the base arms. Nothing worked. The nice new cylinder sat in its box while my chair was in pieces and the smell of WD40 lingered everywhere. After 2 days working from a kitchen chair I finally gave up and ordered a new chair base too. Once it arrived this cylinder was super easy to install and it fit perfectly. It took about a minute to reassemble my chair and the hardest part was getting the wheels into the new base as they kept trying to slide off in any direction but down. That was a few months ago and no issues at all with my chair since then. I don’t randomly start sinking in the middle of video calls anymore. Even with buying the base on top of the cylinder it was still cheaper than a new chair. So overall good purchase but be prepared you may need a sledgehammer to get the old one out. TLDR: product is great, installation is easy. Disassembly of previous part not so much.

Can’t say enough about this great well made piece. Easy to install. I didn’t want to part with my chair. As it’s comfortable and made well. I’ve had it for decades. So finding this replacement gas replacement part was a game changer. I’d highly recommend this item if you should be in the market for a new replacement part.

Teil sehr gut

Good enough but not great