MASTERY MART Heavy Duty Office Chair Base Replacement, 2500 Lbs, 28"(70 cm), Metal Desk Chair Base Replacement Parts with Universal Gas Cylinder Hole and Casters Sockets, Matte Black

All metal, I had to replace a "metal" and plastic one that came with my office chair, but I swapped the caster wheels out for rollerblade style and the sockets that hole the wheel stems started to break and one broke completely, I did not realize they were all cracked until I got the old one off, but this has metal sockets and the stem of wheel fit completely inside. So much better design. It is a bit taller higher than my old one but it's workable. easy to put together. It's a good replacement if you need one.

So far very good office chair Base replacement, it really is heavy duty, all metal even the center of the base where the strut goes is metal.

Good quality base. Assembly is straight forward and had my chair back up and working in less than 5 minutes. Bought this to replace the factory plastic base my chair came with which was starting to crack. Turns out this is a more robust and stronger base than I had. It did add about an inch of height to my chair but not an issue since the chair is adjustable. Easy assembly, works as described and added strength.

Very sturdy. Universal size. Reasonable price.

Fine, except for one thing, namely it takes the bottom of the lift tube a couple of inches higher than a typical base. For me 5-8" it was unfortunate. Also be aware that returning a tube, base or chair bracket for a refund is a bit iffy since the tube is just pressure fit into both the base and bracket. Getting it loose from either end, especially without scratching or otherwise marring the tube, base or bracket isn't easy.

Excellent all-metal replacement for a plastic base that also used plastic sockets for the wheels - they had cracked. Note this base requires assembly, but the design and construction is well thought out. Recommend!

I am a female, weighing at 300 lbs. Personally, it’s sturdy as a heavy set person. Let’s see for the long run if it’s still holding up like in 8+ years

I have a Flexispot C7...awesome ergonomic office chair, until, the plastic base literally split under my big and tall weight. It was rated to 300lbs, and I'm just a bit over that...but, after 8 mos, it failed. So what was I going to do? I played with getting another office chair, rated to heavier weights, but my C7 is pretty darn confortable, I sit for 8-12 hrs per day as I work from home. Then, I found THIS solution. Inexpensive, and rated to 2500...I figured I'd give it a shot. It arrived in less than a week this morning, and 10 mins of simple assembly and my C7 is now ready to roll again! What a great solution to a problem that many of these "normal sized people" office chairs present. Recommend you get the Lifelong Office Chair Wheels Replacement Rubber Chair Casters for Hardwood Floors and Carpet, Set of 5, Heavy Duty Casters for Chairs to Replace Office Chair Mats - Fits 98%...as well, for hardwood floors.