Brand New, Never install Made of Ultra light 6/4 Titanium, normally for Aerospace Industry usage Polished surface Taper head, save 50% lighter than steel 6 pcs for stem (M5 x 16mm) and 1 pc for head cap (M6 x 35mm) Total 16 gram Fit a number of popular stems: Richey WCS 4 Axis Carbon, Easton EA90, Raceface, Syntace, Bongtrager XXX Lite, FSA K-Force,3T ARX