Timsec 2-Pack Fix Sinking Office Chair, 304 Stainless Steel Office Chair Saver for Stop Sinking, Height-Lock Bracket for Failed Gas Cylinder, Adjustable Chair Height Without Cylinder Replacement

I am particularly glad that I bought the TWO Pack, just in case they do slip! As in the photo, I mounted them atop each other with about an inch above them, so even if that inch disappears, I still have a much better situation than without! I installed these four days ago and SO FAR, GREAT! I am NOT a light person (around 205 pounds) and these appear to be holding. I LIKE that they: 1) fit my 1+ inch chair tube as the ad says 2) come with some sort of plastic liner that is non-slip 3) have sturdy screws for severe tightening. I only gave them 4 stars for ease of assembly because I think they would be MURDER to install using the included 6mm hand held hex wrenches. Fortunately, I have metric wrenches for a socket driver. It takes TORQUE to fully tighten these that I doubt can be achieved with your fingers holding the wrenches, but they DO tighten with a good ratchet socket wrench! UPDATED February 4, 2024 - STILL HOLDING and I am NOT LIGHT! AWESOME! To those who still have slippage, MAYBE you need more torque when tightening. I used a high quality socket wrench!

works as advertised, cheaper quicker and easier to use highly recommended

Installing was easy. Works great, holds the seat up.

This product worked great. Only suggestion is that before you install . Use a degreaser or cleaner to thoroughly clean any oil residue on the chrome hydraulic piston sleeve where the rings will be attached. This will ensure no slippage once you adjust and sit on the chair. Also , use both, one immediately over the other to ensure a solid adjustment for your desired height.

Easy to install on the chair and so far it is working great. The chair has not slipped down.