10 Inches to 15 Inches Office Chair Gas Lift Cylinder Replacement, 4.5" Stroke, Hydraulic Pneumatic Shock Piston, Heavy Duty, Universal Fit for Most Office Chairs, Class 4, Polished Steel

OK, so they are space force cool looking, but they work very well, smooth and quiet, easy on the floor

Worked perfectlyoin my Alienware Gamer chair and it was super easy to install. Don’t take the little blue plastic piece off like I did lol. It’s not a cap. I sit higher now than I did on the original which is better for me.

Taking the original Herman Miller Aeron gas cylinder was a pain in the rear! I tried putting on a vice grip and hammering it to the side and it wouldn't budge one bit. I then had to take a pipe wrench and a cheater pipe, got my entire weight on it the same way I do with breaking bolts/nuts on cars and it finally budged.Putting it on, there was quite a bit of play in the mechanism box so I added some electrical tape to this gas cylinder to alleviate some of the wobble. Once the wobble in the mechanism box was gone, I put the base on and tried it out. Once you set the set screw, it works great, however, there is still a bit of wobble/play in the cylinder itself. There won't be any way to actually fix it without getting a different gas cylinder but the wobble isn't as extreme as if it were in the mechanism box.Another thing to note for people that believe it won't hold over time is that the set screw needs re-adjustment over time. I over adjusted the set screw and as it sunk further into the mechanism box over time, it would automatically hit the cylinder button and activate on it's own. For those that are having an issue with it not holding, you might want to try re-adjusting the set screw again.Overall, for the price, I'm extremely happy. One other thing is that it seems to be slightly higher than the original gas cylinder but that's typical with aftermarket gas cylinders. I'd rather pay $20 for a decent gas cylinder vs $60 for the original gas cylinder (without any wobble) any day. It'll eventually wear out anyways and another one will be required.

I wanted to turn a really nice office chair into a counter stool for my mother. I realized that I needed to convert the wheels to stationary chair guides, and to buy a new gas cylinder that increased the max height of the chair.I actually did some measurements prior to purchasing this. Most office chairs have a maximum height of around 21-22 inches. My chair had a max height of 23.5 inches, but I still needed higher. And I later learned that I would need to account for the "plushiness" of the cushion, compared to a firmer bar stool type chair, as the cushion would sink in an inch after you were sitting in it.I was weary about how long these things last, so I tried to buy the exact size where the minimum setting was high enough to not require it to be lifted at all. So I originally bought the 8 inch lift gas cylinder. At it's minimum height, this made the chair like 27 inches high, which was too high for my needs.I ended up exchanging the 8 inch one for this 4 inch gas lift that was slightly too short, but only required a tiny bit of lift. And for the price these cost, I'm no longer worried about them not lasting for years. I can just buy another one.Installation was easy, because it was a relatively new chair. I recommend you take the wheel base off first. So place your chair probably head down, ideally on some carpet, fully exposing all wheels in the air. Then get a rubber mallet and hit against the gas lift bottom while pulling on the wheel base, and eventually the base will come off. Then get a pipe wrench or some kind of wrench with a wide enough opening, and turn it the lift cylinder to the left. Mine came off relatively easily. The whole process probably took less than 5 minutes which surprised me cuz some people say it takes like an hour of banging.My original chair piston was not broken, so I wanted to preserve it the best I could. Some say you can protect it from scratches if you put like a rag in between, but in my opinion, that's not feasible because it'll just cause the wrench to spin. I removed the old piston the best I could, but there are pipe wrench marks on it. I wanted to keep it because not only is it still good, but if I ever wanted to turn it back into a regular chair I could.Only had it about a couple of weeks, but so far so good. You're apparently suppose to go up and down on the cylinder every week or so to keep the piston lubed, but I've never done that, and most people probably don't once they find the ideal height. But that's what you're suppose to do for maintenance.I'll reiterate that I do believe this may make your chair taller than it was before on it's lowest setting, and has the range to make it much taller (drafting chair height) if desired. I've never had an issue with these before, because I always sit at the lowest setting which is around 17 inches on most chairs.

Works as described and easy to install. Hopefully will last longer than original that lasted only 2 years.

I used this to replace my gas cylinder in my chair (which was quite difficult, but I wouldn't say that was the fault of this product so much as just that it's hard to get cylinders in and out of chairs). This cylinder doesn't work. It keeps raising the chair when I'm not sitting in it, then sinks to the bottom setting when I do sit in it. No matter what I do, I can't get it to stay down when I'm not sitting in it, and I can't get it to stay up when I am sitting in it.For the record, this listing says it's rated for 450lbs, and I weigh less than half that, so this isn't a case of me misreading the product's capabilities. Amazon requires you return the package to get a replacement or a refund, and since I'm lacking in transportation at the moment, I'm not in a position where I can pack this thing up and send it back, nor am I eager to get another one when this first one failed so badly and was so difficult to install.Do yourself a favor: DO NOT get this cylinder.

I have had this gaming chair for a few years, So uninstalling the old Cylinder took a little work and a 5LB sledge hammer to separate it from the seat. The video made it look easy and it should be. Old chair = headache. anyway, the install and fit were perfect. my only complaint is that when I opened the amazon package, the Cylinder box seal was broken . you can tell it was a return. other than that, it is o.k. and works as it should . A great save of an old chair.

I'm 5' 11" -- desks are generally low and office chairs heights encourage (allow) slumping. Raised my desk 4 inches (2" x 4") and installed a long air piston. Most of my back problems and carpal tunnel were relieved in days. Removal of the old piston was relatively easy (youtube videos). Installation was a snap. I sit-up straight and no longer twist my legs to find a comfortable position. Worth every penny.

Bought this to replace a gas shock in my new chair I bought. Only had the chair for less than a year and bang the shock goes on it. This one looks to be more heavy duty. I’ll give it a try and see. So far so good. Installing was easy. Just make sure you look on YouTube for pointers as it can be stubborn to remove the old shock.

This thing is tall! Great quality and works like intended.No complaints.

It did the job and works great

Sehr gut. Danke.

After a month of usage the chair is wiggling and creaking like crazy. Absurd for the price I paid.UPDATE****I received a replacement that seems completely fine and it was at no additional cost. Support was quick to reply and very polite. I honestly didn't expect that and I was happily surprised. I highly recommend the product.