Maruishi Stem. I Waxed both bolts with a toothbrush and auto wax. Also did a quick polish of stem with Noxon 7 metal polish. It is ready to install after you grease the stem. Obviously this can go on any bike that needs a 22.2 stem, but Maruishi branded is hard to find. I do not know who made this for Maruishi. It looks like the word Will is on the lower part of stem, as well as 22.2 and the max. height line. Clamp dia. is 25.6, so probably a 25.4 Also cleaned out the basement of a bike closure and have many more goodies coming, thanks much--------Mark