9.7" to 13.7" Long Adjustable Gas Lift Cylinder Tube for Office Chair Stool Replacement Parts,Heavy Duty Hydraulic Pneumatic Cylinder Shock Piston (4"Stroke)

Takes a bit to get old one off but this fit right in and it can go up pretty high, so be sure that’s what you want.

Perfect and tall! Wow! Haha!!! This is exactly what I needed. I needed a drafting chair, but loved my old Serta, and didn't want to part from it. So, why not? This turned my old comfy chair into a tall comfy chair.Installation was super easy. Taking out the old piston wasn't that difficult, either. (There's plenty of instruction videos out there. A pipe wrench came in handy for disassembly.)

Used this to heighten my office chair to coincide with my adjustable desk. I thought I needed a much higher cylinder. Don’t underestimate the 22” height! This is more than enough and my chair fits comfortably at the desk fully extended or a regular desk at the lowest setting (and everywhere in between.). The cylinder is smooth, quiet and very well made. Great quality and highly recommend.

Easy fix esp if have good pair of water pump type pliers. This cylinder is aLittle taller than usual which is what I was looking for.

Was looking to gain some height on an office chair I recently purchased so I decided to give this a try and when I say this has exceeded my expectations so far. It's been about 6 months now and it's holding up great.

Worked perfect. First one I’ve had actually is high enough for tall legged people.

I needed a replacement air lift cylinder for my lab stool. I ordered a cylinder (not this one) then struggled to get the old cylinder out of the chair. I applied penetrating oil and still needed a 3 foot breaker bar on the pipe wrench while standing on a 3 foot breaker bar to hold the chair from moving. The wrench put deep gouges in the old cylinder, but it came loose. The replacement turned out to be too short. It also would not seat completely, and the chair would not adjust height. I was not able to measure the cylinder while it was still in the chair and ordered the wrong cylinder. That is on me. I ordered this cylinder after I was able to measure the original. It fits, and the chair height is adjustable. Don't believe the videos that show how easy the cylinder is to remove. More than once I thought the torque would ruin the chair. This is a good product. It went in easy. I hope I never have to replace another one of these.Update:The chair is now wobbly. The metal in the chair's seat must have deformed when I removed the old cylinder with such force. I need a new chair.

Replace the piston in my daily office chair 1 year and 3 months ago. Today the piston is not working. After increasing the height of the seat, the level quickly dropped down to the bottom. There are no visible external signs of fluid leaks.I would have expected to get a lot more time out of it.