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I can't find the exact one I have (currently out on paternity leave), but it's something like this. It's counter weighted so you can go from sit to stand with one hand which is really nice.
I do wish my entire desk moved, I can't really review drawings or look at more than two documents at the same time while standing, but it's a good compromise.
I think I found it...
^wonder why Amazon removed the "share" button which gave a nice shortened link