8" Long Stroke Adjustable Office Chair Gas Lift Cylinder Replacement Hydraulic Pneumatic Shock Piston Heavy Duty (450 lbs) for Tall Person Universal Size Fits Most Executive Chairs

Excellent choice, as advertised.

I have a secret lab titan , but it was too short for my recently installed wall mounted desk , so I got this , now my feet don’t touch the ground ( I am 6’0ft) but my body is positioned just right for my desk. Sturdy , I never feel like it’s going to break . The install was tricky but if you have a rubber mallet to remove the old piston , then you should be good to go .

Purchased a new and comfortable office chair and wanted to be able to have it rise higher. So bought this 8" cylinder to replace OEM. Worked fine and liked the pricing. Appears solidly made.

Exactly has described; arrived on time.

I needed a gas-filled cylinder for a chair that could go high up, as I needed one for the garage use. This one is longer in its fully compressed position compared to average cylinders, and when extended you are sitting really high up. Even at fully compressed height is high enough for me.

I was unable to use this item. The person I asked to install it was not able to remove the old lift from my old chair despite his above average strength and employing every method he could think of. I decided to keep the chair lift because I'll always have an office chair, so hopefully I'll be able to use it when the one on the new chair wears out.

I've using this cylinder on my computer chair, and after only two months of non excessive use, the cylinder failed. It keeps rising on its own. This is a Herman Miller office chair, and the adjustment system on the chair appears to be working properly. I believe the pin on the cylinder that's used for the height adjustment has failed.

-EDIT- It wasn't until after I had already replaced this, that I became aware that the Herman Miller Aeron has a bad habit of needing to have the cylinder actuation manually adjusted as every cylinder is slightly different. Unfortunately didn't get to test that fix on this cylinder... But I have reason to believe it more than likely would have worked had I done so. Corrected my review to three stars to account for this as the one star is no longer accurate as it was the chair's fault. I can't go any higher as I didn't actually "use" the piston. This thing dropped from highest to lowest within 15 seconds without any levers set on it when I sat down in it after installing it on my Aeron Chair. Overall, this nets me the same active height as my previous cylinder at that one's max height, but without any of the rocking that one exhibited when doing so. This is 100% a bar stool class cylinder. Make no mistake, if you throw ~250-300lbs at this thing it will collapse like a sand castle. 450lb is a joke. Maybe a child or pet could actually use this at max height with an Aeron? In day to day, a steel rod with ballbearings for swivel would have accomplished the same thing. Looks like I'm getting some taller casters to make up the extra inch or so I need that I was hoping to get with this.