MASTERY MART 28 Inch Office Chair Base, Heavy Duty 2400 Lbs, Reinforced Metal Desk Chair Replacement, Universal Gas Cylinder Hole Caster Socket, Matte Black

A crack formed in the plastic base of my "Union & Scale Dexley" chair from Staples, as seen in the "BEFORE" pictures. This caused a tilt that made the chair almost unusable, though the rest of the chair was in excellent condition. I was able to remove the old base using a hacksaw, several hours, several bandaids, and lots of sweat.Installing the new base was simple - it only took a few minutes, 5 screws, and installing the old wheels (which fit perfectly). Now instead of spending $180-$400 on a new chair, my old chair is working good as new ("AFTER" picture). I weigh about 330 pounds, I will update this review if the base fails in the future, but it seems pretty sturdy.I want to reiterate how difficult it was to remove the old base. If you have a crack like mine, know that there is a metal ring on the piston that digs into the plastic, basically fusing with the base. No amount of hammering will get it off. You will need to cut it off like I did, though interestingly the base was pushed so far up that I could have just put the new base on the bottom and it would have worked fine (2 bases!).I think if I get a new chair with a plastic base in the future, I will hammer off this one and use it again instead. Plastic bases are trash.

When the package arrived, I was expecting a different form. But I found that the base assembled very easily and well designed. Solid steel construction. I only added lock washers to the screws as added insurance. Could have used Lock-tite thread locker I suppose. Over all, I am quite pleased with the new base. I do not anticipate having to ever replace it or to have any problems with it.

I had replaced the gas cylinder in my older office chair first, it ended up sinking through the base and hitting the floor, making the chair unstable and uncomfortable. So I decided to try replacing the base with a metal one instead of plastic, and this works great so far. Feels much sturdier, and the angle and material gives you a slight height boost as well. Works with standard size gas cylinders as well, and assembly of the base is super easy and quick.Honestly the hardest/longest part for you is going to be getting your OLD base/cylinder OUT of the old chair, that was extremely difficult for me, you should be prepared with a Rubber Mallet, some WD40, and possibly a Pipe Wrench, and bring some muscle cause all that stuff is set by weight and if you have an older chair like me, it was ROUGH to come off, even after doing it recently to replace the gas cylinder. Good luck!No issues so far, will update if necessary.

I did not think it would work, but my rollers and gas lift all fit perfect in this new chair base.I have a Sealy office chair from like 6 years ago, fabric is still in decent shape and this saved me $100 or more for a new chair I almost bought, course now I have to hope it will last.The base is metal and you do have to assemble it onto the base hub, but that was easy with just 5 bolts to tighten.

The product seems great. Very solid, easy to assemble, and well packaged. The only reason I did not rate 5 is the primary picture of the product and description are slightly deceptive. The picture shows it has casters, so I assumed it came with casters. The product description says nothing about "casters not included." So now, I have to wait another day and pay more money to get casters.

Decided it was slightly less expensive to replace the bottom of my chair than to buy a new one. The base replacement attached quickly and easily and has held up and work great for the last 3 months. Recommended, it seems to be working with daily use.

It was great! Easy enough for my grandson to remove the broken chair leg and install the new ones. Thankfully I ordered the correct replacement! Still working great!

I had high hopes of durability with the description of 2200 lbs support ability for “many years of use”. It survived 15 months before the wheel socket broke off.