I don't know. I've searched the internet, and found it all over the place for sale, but no one mentions a brand name. It was on my used gsxr600 track bike when i bought it. The bolt holding it to the frame fell out, and i replaced it. Then the two bolts holding the cylinder in place got loose and it got in a bind. I fixed that tonight, but then went a little further and decided to check that bolt. It turns easily and doesn't stop.