14 Inches-22 Inches Extra Long Gas Lift Cylinder Replacement, 8" Stroke, Hydraulic Pneumatic Shock Piston, Heavy Duty 1000lbs, Universal Fit For Drafting Chairs Bar Stools, Class 4, Black

Great replacement cylinder! The size was spot-on, installation was straightforward, and it brought my chair right back to the height and stability it originally had. Smooth lift, solid feel, and no sinking issues at all. Exactly what I needed highly recommend if you’re repairing or upgrading an office chair.

This worked perfectly to fix our computer chair and our manners! It was embarrassing to slowly sink uncontrollably in our computer chair every time we sat in it - especially in front of guests. It was easy to assemble and the chair feels very sturdy now. I love not sinking anymore! It really is the little things in life that make me feel happy, this chair part helped a lot!

Easy to install, works very well.

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.

Removing the old cylinder necessitates the use of a hammer, wrench, lubricant, and potentially a vice to secure the chair legs during extraction. Significant force is required for removal. No instructions were included in the cylinder packaging, making it necessary to consult a YouTube video for guidance. The device appears to be functioning properly following installation.

I needed to raise my office chair so that top of desktop monitor was 2 inches below eye level. I replaced the cylinder on my office chair with the Tall Chair Cylinder and it easily achieves this and could go even higher if needed. It seems very sturdy and has maintained the height setting. Replacing a cylinder is fairly easy if you have the proper tools. I would not attempt without a cylinder removal tool. Here is a picture of the tool.

I bought this Mastery Mart office chair gas lift cylinder MM-REP-GL001-BL-US to fix a Tempur-Pedic 9000 chair with a Type KGL DIN 4550 Klasse 4 49/18 gas lift cylinder. It's a perfect fit.

It was my first time replacing a chair cylinder. I researched online to understand the size and rise for ordering the correct replacement cylinder. My order arrived quickly, well packaged, and as described. I used an 18" pipe wrench to remove the 25+ year old cylinder from the bottom of the chair and a small sledge to knock the cylinder out of the chair's wheel base. Installed the new cylinder in under 30 seconds. Total time to remove/replace cylinder: about 90 seconds. This quick DIY repair project saved my family from having to purchase a replacement office chair. I would definitely purchase replacement cylinder(s) for any of our 4 office chairs from Mastery Mart moving forward.

Es funcional, es lo que requeria

Fits perfectly!

Very well made. Super sturdy.

fonctionne très bien, remplacement de mon ancien défectueux,facile a changer mais avec le matériel adéquat et un peu d'huiles de coude pour le reste conforme a met attente. je recommande.

Tavsiye Ederim