TruVativ Holzfeller Mountain Stems are constructed of forged 66 aluminum.Forged AL-66 constructionHeight = 50mm, 290 grams for 60mmItem SpecificationsColorBlackWeight205gIntended UseDH/FreerideBar Clamp Diameter31.8mmStem Angle90degStem Length50mmDefined ColorBlackS.H.I.S. Clamp Diameter38.1