I'd have to look it up, all of my stuff is in storage right now since I'm moving soon. I'll look when I get home though and see if its readily available. I just got it from an LBS. Explained to him it was a headset with 3 notches the size of bottom bracket notches and he pulled one out of a drawer. It took a few tries to get mine off, the leverage is finicky and far from ideal, but with patience and an over-abundance of cuss words to scare it into submission, it'll come right off.