Ahh, the Chris King headset. That is about all of the description that is needed here. This premium quality headset is pretty much the gold standard in the industry. This particular grouping is the External Cup NoThreadSet sort. They come in all sorts of colorful flavors and we offer it here, to you, in 1" and 1-1-8" straight as well as 1-1/8"-1.5" tapered. Those last ones fit our very nice Milwaukee Bicycle Co. Mettle, Gravy and Feral models. You should probably check those out, too, if you gotta minute!