http://www.mr-machining.com/bi....cycle-frame-building Stem Parts Bicycle Frame Building Parts: Titanium Bicycle Stem and its Parts Material: Titanium 6/4, Ti Gr5, 6AL-4V titanium Surface treatment: Anodizing, PVD coating, Bright Brushed, Matte Blast Finish and Raw Supply LOGO Engraving or LOGO Laser Marking Service The Titanium Bicycle Stems and Its Parts in Morong we made are in 100% titanium for total security- the stem, the face plate and even the bolts are 6AL-4V titanium. 6AL-4V titanium is the best pick of the high-strength alloys, thanks to its superb mechanical strength, low density and corrosion resistan