Office Chair Cylinder Replacement Parts, SUBHTOH 4.0 inch Stroke Gas Lift Cylinder, Hydraulic Piston Cylinder Heavy Duty 1000 LBs, Standard Size Fits Most Office Chair and Swivel Chair

Installing this item was straightforward, except the instructions said to remove a red cap but there was none. There is an orange button which I left in place and others seem to have done the same. Works fine.Getting the old cylinder out was a PITA. There is a retaining clip on the bottom which, to be fair, the instructions did say to remove. I did not do this and wound up smacking the old one out of the base several times with the hammer side of my 8lb splitting maul. That worked but now I think it might have gone easier if I had removed the clip - perhaps it would have relieved the internal pressure and made the cylinder slightly narrower.To get the other end out of the chair mechanism I went to Harbor Freight and spent $12 on a big pipe wrench. 5 minutes after getting home it was out and the chair was usable again.Overall very happy. Would purchase again.

great replacement/upgrade for my office chair

Easy replacement, Good fit up on my chair. Works as it should. Cheaper than buying a new chair.

Bought this as a replacement for a Tarok Razer chair, it works a treat, combined with an aftermarket chair star base, the chair has better height adjustment than with the original fittings

This slid right in as a replacement to my chair I got from staples. I dealt with a blown hydraulic cylinder for the last year and a half. Finally got tired of it but am not at the point where i'm ready for a new chair. This cylinder fit perfect, took less than 10 minutes to remove the old one and replace with this, and It's been working great for the last few months of use.